Recall lumps in trifle (5)
I believe the answer is:
straw
'trifle' is the definition.
(I've seen this before)
'recall lumps' is the wordplay.
'recall' is a reversal indicator (I've seen 'recalled' mean this).
'lumps' becomes 'warts' (I have seen 'unwanted lumps' mean 'warts' so perhaps 'lumps' could also mean 'warts').
'warts' reversed gives 'STRAW'.
'in' acts as a link.
(Other definitions for straw that I've seen before include "Stalk - tube for drinking" , "Thatching material" , "Dried grain stalks" , "Plant fibre used as fodder" , "Pale yellow colour" .)