"Hello" Grammy winner (5)
I believe the answer is:
adele
'hello grammy winner' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for adele that I've seen before include "Female English singer-songwriter, b. 1988" , "girl" , "Female singer from London" , "Performer" , "Singer with albums titled 19, 21 and 25" .)