A pile of canapes (3)
I believe the answer is:
nap
'a pile' is the definition.
(both can refer to the surface of a fabric)
'of canapes' is the wordplay.
'of' indicates the answer is hidden within the clue.
'NAP' is hidden in the letters of 'canapes'.
(Other definitions for nap that I've seen before include "A short day-sleep" , "Kip" , "one akin to whist" , "Pile of material" , "Short sleep on soft surface texture?" .)