That Isn't the Question solution
by Kegler

Per 24 Across, TWO B OR NOT TWO B, five answers have BB added and five others have BB removed to become new words.

That Isn't the Question solution grid

Across
1C + A(T + T)LE
7SIG + eHT (rev)
10ODES (rev hidden)
11PAP + A
12F(L)EW
14HOBo + BLED
15S(P)IRE
16PITy + H
18NIBBL + E
19BI(PEts)D
20VIA + ND
22BABBLED (BLADE anag)
23LOG (2 defs)
24TWO B OR NOT TWO B
27braZEN
29LA(SAG)NA (GAS anag)
34S + LEEK
35A + GREEn
36HEC(U)BA (BEACH anag)
38LARS (hidden)
39gLoOBBmY
41C + RIBBED
42YE + LP
43OBOE ("OWE BEAU" hom)
44A + NTI (NIT anag)
45UN(L)IT
46I + SO(GO)N
Down
1C + OH + A + BIT
2A + DON + IS
3TELEPHONE CALL (PEAL ON THE CELL anag, &lit)
4LAD + I'D + A
5CAP (rev)
6SPINE + L
7SARI ("SORRY" hom)
8GLO(BAL)W + ARMING (LAB rev)
9HELL(N)O
13WE + B + BED
15STAB (rev)
16P(EBBL)E
17HOBNAIL (BIAtHLON anag)
20VETo
21ID TAGS (DIGS AT anag)
25O(A)K
26B + LEN(D)IN
28E + L + EVEN
30S + WABBY
31G,(RABBi)Y
32NAR + COS (RAN rev)
33HER + ETO (TOE anag)
34SH + ABBY
37BO + OT (TO rev)
40BOA (1st letters)