Very big shirt given to wealthy bird (7)
I believe the answer is:
ostrich
'bird' is the definition.
(I know that ostrich is a type of flightless bird)
'very big shirt given to wealthy' is the wordplay.
'very big' becomes 'os' (abbreviation for outsize).
'shirt' becomes 't' (as in a T-shirt).
'given to' is a charade indicator (letters next to each other).
'wealthy' becomes 'rich' (similar in meaning).
'os'+'t'+'rich'='OSTRICH'
(Other definitions for ostrich that I've seen before include "Fast winger" , "Chorist (anag.)" , "Torch is held over large bird" , "He ignores the truth" , "Largest extant bird" .)