Singer Sheryl ____ (4)
I believe the answer is:
crow
'singer sheryl' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for crow that I've seen before include "Black bird; brag" , "Bird in 1's poems" , "Boast gloatingly, American Indian" , "one often getting stoned!" , "'As the - - flies'" .)