Crow, boast (4)
I believe the answer is:
brag
I believe this is a double definition.
'crow' is the first definition.
(I know that crow can be written as brag)
'boast' is the second definition.
(I know that brag is a type of boast)
(Other definitions for brag that I've seen before include "Card game - boast" , "Shoot a line" , "Idle talk" , "Boast, exaggerate" , "game of bluff" .)