Aardvarks eat them (4)
I believe the answer is:
ants
'aardvarks eat them' 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 "24 [INSECT] s" , "Busy little insects" , "Small social insects" , "Termites" , "Soldiers" .)