Flower caught on bird (6)
I believe the answer is:
falcon
'bird' is the definition.
(falcon is a kind of bird)
'flower caught on' is the wordplay.
'flower' becomes 'fal' (I've seen this before).
'caught' becomes 'c' (cricket abbreviation).
'fal'+'c'+'on'='FALCON'
(Other definitions for falcon that I've seen before include "Hunting bird like peregrine or merlin" , "Hunting bird, may be peregrine" , "Kestrel, for example" , "Clan of (anag) - raptor" , "Hunting bird, may be trained" .)