I wager it's different for an insect (6)
I believe the answer is:
earwig
'for an insect' is the definition.
(earwig is a kind of insect)
'i wager it's different' is the wordplay.
'it's different' is an anagram indicator (letters placed in a different order).
'i'+'wager'='iwager'
'iwager' is an anagram of 'EARWIG'.
(Other definitions for earwig that I've seen before include "little insect" , "Small insect with aural toupee?" , "listen in?" , "flatterer" , "court" .)