Wading bird fluttering at cove (6)
I believe the answer is:
avocet
'wading bird' is the definition.
(avocet is a kind of wading bird)
'fluttering at cove' is the wordplay.
'fluttering' indicates anagramming the letters.
'at'+'cove'='atcove'
'atcove' anagrammed gives 'AVOCET'.
(Other definitions for avocet that I've seen before include "Long-legged wader" , "Black and white Eurasian long-legged wading bird" , "Black-and-white shorebird with upward-curving bill" , "Shorebird with bill curving upwards" , "Curved-bill shore bird" .)