In 1ac on the edge of 23, a pair of 1d, (16 and 41ac) would work together converting a 31 from the 6ac to 46. Down in the 47, 41ac 13. Wordplay only is given for all of those words. Solvers must highlight the tool (7 contiguous letters).

Across     1    Criminal adopting plan to snare (7)     6    Period of indulgence in activity securing gold (6)     10    One protesting strongly (a bishop) about trouble with energy (6)     12    Fine glazed fabric making a comeback (4)     14    Asexual reproduction in a school essentially ethological book (12)     16    Wrote a spy novel (9)     17    Produced revolutionary milk product (4)     19    Tanned forehead and tip of nose (5)     22    Self-mortification of character abandoning Cornish resort (7)     23    Eccentric architect (9, 2 words)     26    Tree genus in international law (4)     27    Division in church is involved in drink (5)     29    Head loses one kitchen employee (4)     31    House European (9)     34    Fairness when publicity's pulled out of state of decay (7)     35    Endlessly crafty little insectivore (5)     36    Instrument of European Union protecting retrograde Croatia (4)     37    Sadly, alas, a posh dog (9, 2 words)     41    Victoria's persistent cadger; Twain's mischievous protagonist (12)     44    Veronese consortium's bottled wine (4)     45    Ed's to encircle backsliding workers in remote regions (6)     46    Projects surrounding opening of Klondike (6)     47    Made sure of having money (7)

Down     1    Wild pigs circling, idle but ill-disposed (12)     2    Thus wicked person's overthrown (4)     3    Some ambitious miners used up trees (4)     4    Raised animals' offspring, young sheep (3)     5    Number regularly started on head of Yukon (4)     6    Subtler snaring ultimately gullible once, to fraudulently get goods on credit (6)     7    Beginning of obsession concerning poet's precious metal (3)     8    Return to former position as tree split (6)     9    Capetown's expression of disgust for little sibling (3)     11    Advance without companions we hear (4)     13    Company of performers including setter of primarily fictional unfinished work (12, 3 words)     15    A principally problematic lyric poem lacking feet (5)     18    Agree to frenzied decadence without disorderly end (6)     20    Bird's classy car (6)     21    Large mammal perishes keeling over losing head (3)     22    Dance step with extremes of popularity (5)     24    Hew brushwood in the north (3)     25    Transparent film material oddly used in creels (3)     28    Praise, in times gone by, when alchemist's metal turned up (3)     30    Malicious woman's heartless romp in the cut grass (5)     32    Old form of charged nucleus of uranium included in noted upset (6)     33    Returned calls one ignored in city dwellings (6)     35    Indigenous northern dweller's mounting bleating sounds (4)     38    Norse god seizing gutless miserable souls (4)     39    Struck with amazement; cut wood with skill initially lacking (4)     40    Magistrate's legal advisor twice trimmed antiquated tax (4)     41    Primarily built employing lakeside exotic tree (3)     42    In Glasgow obtain unlimited share in business ... (3)     43    ... a manuscript turning up there, great! No, quite the opposite (3)

To enter this competition, send your entry as an image or in list format, indicating the highlighted entry,  to ccpuzzles@talktalk.net before 8th March 2020. The first correct entry drawn from the hat will receive a book from the Chambers range, which has been donated by Chambers.