Insect eggs (4)
I believe the answer is:
nits
'insect eggs' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nits that I've seen before include "Fools" , "Eggs; stupid people" , "Tins of parasitic insect eggs" , "Head louse eggs" , "Eggs of lice" .)