Animal making insect run away (8)
I believe the answer is:
antelope
'animal' is the definition.
(I've seen this before)
'insect run away' is the wordplay.
'insect' becomes 'ant' (ant is a kind of insect).
'run away' becomes 'elope' (I've seen this before).
'ant'+'elope'='ANTELOPE'
'making' acts as a link.
(Other definitions for antelope that I've seen before include "A graceful gazelle from Africa" , "One leapt badly on the graceful animal" , "Eg, gazelle or gnu" , "Swift deer-like animal" , "Hartebeest, perhaps" .)