Solution to the Crossword Centre Prize Puzzle December 2020

 Solution to Seasons Greetings XII by Eclogue

The extra letters from wordplay provide “SISTER SUSIE SITTING (on a) THISTLE”, a line from “All I Want for Christmas is MY TWO FRONT TEETH” by Donald Yetter GARDNER.  Two INCISORs were therefore the required highlighting.

Across

1 Gram; MARG<

5 time; EMIT<

S 11 Armani; A + MAN in [S]IR<

I 13 purer: PU[I]R + ER

S 14 Leblanc; (BELL[S] CAN)*

T 15 Nestor; NEST + [T]OR

E 17 hechs; HE +CH[E]S(s)

R 18 inrush; [R]IN + RUSH

S 21 avoided; [S]IDE in A + V + OD

U 24 Cassio; CAS(t) + IO[U]S*

S 25 rices; CRISE[S]*

27 aloo; hidden; vindALOOs

28 axon; AX + ON

I 32 Tutsi; [I]T + (SUIT)*

E 34 castor; CAST[E] + OR

S 36 flensed; (ENDLES[S] + F)*

I 37 espada; PA[I]D in (SEA)*

T 38 scudo; SCU[T] + DO

T 44 Cyrano; (CAN [T]ORY)*; ref. Cyrano de Bergerac

I 45 bemuses; EM[I] in BUSES

N 46 kukri; UK in (RI[N]K)*

G 47 épuisé; PU[G] in (I SEE)*

48 spat; initial letters; S P A T 

49 read; RE + AD

Down

T 1 Gallican; CAN[T] after GALL + I

H 2 ambers; (c)[H]AMBERS

3 nas; N A S

4 ins; two meanings

5 ich; I + CH

6 ane; (me)ANE(st)

7 pec; PEC(k)

I 8 tushie; HI in (SU[I]TE)*

S 9 meowed; ([S]OME)* + WED

T 10 erred; hidden; fERRE[T] Down

L 12 regnal; REG + N + AL[L]

E 16 muso; MUS[E] + O

19 sits; (ST + IS)<

20 hose; (t)HOSE

21 arid; (AIR)* + D

22 vice; three meanings

23 ocas; CA in OS

G 26 unraised; ([G]RAIN USED)*

A 29 asps; S[A]P in AS

R 30 oodles; LE in [R]OODS

D 31 play up; LA[D]Y in PUP

N 33 uncart; [N]UN + CA + RT

E 35 tassie; T[E]A + (IS)< in SE 

R 36 fecks; F + [R]ECKS

39 uni; hidden; mUNIcipal

40 dog; two meanings; &lit.

41 obo; initial letters; O B O

42 bee; two meanings

43 ump; hidden; stUMPs