Bird at cove, flying (6)
I believe the answer is:
avocet
'bird' is the definition.
(avocet is a kind of bird)
'at cove flying' is the wordplay.
'flying' indicates an anagram (letters fly around into new positions).
'at'+'cove'='atcove'
'atcove' with letters rearranged gives 'AVOCET'.
(Other definitions for avocet that I've seen before include "Black-and-white shorebird with upward-curving bill" , "ornithological specimen" , "Black and white Eurasian long-legged wading bird" , "Long-legged wader" , "Shorebird - octave (anag)" .)