Pests in a pantry (4)
I believe the answer is:
ants
'pests in a pantry' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ants that I've seen before include "They live in a formicary" , "Termites" , "Soldiers" , "24 [INSECT] s" , "Busy little insects" .)