Flier in contravention (5)
I believe the answer is:
raven
'flier' is the definition.
(raven is a kind of birdanimal)
'in contravention' is the wordplay.
'in' says the answer is hidden in the clue.
'RAVEN' can be found hidden inside 'contravention'.
(Other definitions for raven that I've seen before include "Large bird of the crow family" , "Largest member of crow family" , "Big black bird" , "Jet-black" , "pig" .)