Ladybug's prey (5)
I believe the answer is:
aphid
'ladybug's prey' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aphid that I've seen before include "Greenfly etc" , "little sucker" , "Blackfly or greenfly" , "Insect feeding on plant juices" , "Sap-sucking bug" .)