Perks solution
by Kegler

One letter from each of fourteen answers falls outside the grid; reading clockwise from the NE corner, these letters spell FRINGE BENEFITS.

Perks solution grid

Across
1MANTLE (MENTAL anag)
6RULER (2 defs)
10FO(REWAR + NIN)G (NIN RAWER rev)
12RUSTPROOF (TROOP'S FUR anag)
13R(HENIS)H (SHINE anag)
14O + INK
15ENI(G)MA (AMINE rev)
16C + ON + SI + DER (rev)
18ENAC + TO + R (CANE rev)
23VENDORS (REV NODS anag)
24N(EATEN)ED
26SO(LID) + I
28AMEN (NAME anag)
29RAINIER (2 defs)
31ENAM + ELLE + D (MANE rev)
32ALLA(ME + RICk + A)N
33TORSI (IRS TO anag)
34D(RON + E)R
Down
1MOURN ("MORN" hom)
2INELEGANT (hidden)
3TWaIN
4L + ARIA(T)S
5ON + SHORE (HORSE anag)
6TRITON (2 defs)
7UNPOSED (END UP SO anag)
8SE(CON + DA)RIES
9ROO(KEn)D (DOOR rev)
11THIN + GAM + A + BOB
17I DO + LIZ + IN + G
19CRE(N)ELS
20uO(VER + L + A)Y (rev)
21I + NSIDER (DINER'S anag)
22P(E + AN)UT
25NEL + LIE (LEN rev)
27D + REAR
30diNERO