Roll of cash (3)
I believe the answer is:
wad
'roll of cash' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for wad that I've seen before include "Bankroll; sandwich (slang)" , "A thick bundle, maybe of money" , "A bundle as of documents or banknotes" , "Small bundle" , "Small mass of soft material" .)