Raptors, eagles principally, getting stuck into young animals (5)
I believe the answer is:
kites
'raptors' is the definition.
(kite is a kind of raptor)
'eagles principally getting stuck into young animals' is the wordplay.
I cannot quite see how this works, but
'young' could be 'kit' (kit is a kind of young) and 'kit' is found within the answer.
The remaining letters 'es' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for kites that I've seen before include "More than one toy" , "Small hawks" , "aircraft" , "Aerial toys; birds" , "Large hawks or flying toys" .)