Shoot involves celebrated bird (7)
I believe the answer is:
bustard
'bird' is the definition.
(bustard is a kind of bird)
'shoot involves celebrated' is the wordplay.
'shoot' becomes 'bud' (I've seen this before).
'involves' indicates putting letters inside.
'celebrated' becomes 'star'.
'bud' enclosing 'star' is 'BUSTARD'.
(Other definitions for bustard that I've seen before include "Large heavy bird" , "flyer" , "Long-legged, heavy-bodied bird" , "See large bird" , "Bad rust (anag.)" .)