Some Assembly Required solution
by Kegler

The names of tools are added to ten answers to form new words.

Some Assembly Required solution grid

Across
1TYPI + FYI + NG (PITY anag)
8YEA + R
11YeARN
12PRUDENCE (CRUDE PEN anag)
14PROFILE + D
15B + LOC
16B(L)OO + D
17GOOdSANDER
20S(EE)SAWING
21A + TOP
22STRA + WHATS (ART'S rev)
25PESO (POSE anag)
26C(LASS)Y
27P + OOL (LOO rev)
28EDIT (1st letters)
32ADVISE + D
36INMOST (INTO S&M anag)
37BOAt
38EWER (hidden)
39M + ANDRILL
40EYESPOT ("ICE POT" hom)
41uSE + SAME
Down
1TYPO ("TIE POE" hom)
2YARD (rev)
3PROTOZOA (OP ART ZOO anag)
4IN + FOr
5FR(I + CASS)EE
6IRES (SIRE, move the S)
7NUD(G)ES
8YELLOWHAMMERS (SOY WELL anag)
9AC(CO + U + N)TS
10RED-DOG (DODGER anag)
12PLANET,S
13NOt + OK
16B(R)AWLING
17GRASPABLE (2 defs)
18O(RTHODO)X (HOT ROD anag)
19S + UPPLIERS
23A/C + TIONS (IS NOT anag)
24SaYS + TO + LE (EL rev)
29DEEM (hidden)
30PODI + A (IPOD anag)
31PSALM (LAMPS anag)
33VALE ("VEIL" hom)
34SWAP (rev)
35yDART (rev)