Bunch of bills (3)
I believe the answer is:
wad
'bunch of bills' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for wad that I've seen before include "Pad of loose material used for packing" , "Small bundle" , "Lump or bundle of soft material" , "Small mass of soft material" , "Compact mass" .)