Dryer accumulation (4)
I believe the answer is:
lint
'dryer accumulation' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lint that I've seen before include "Absorbent material for dressing wounds" , "Soft material for dressing wounds" , "Fabric for dressings" , "Napped cloth used to dress wounds" , "Wound-dressing fabric" .)