Country singer Loretta (4)
I believe the answer is:
lynn
'country singer loretta' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lynn that I've seen before include "King's --, Norfolk town" , "Dame Vera -, the 'Forces' sweetheart'" , "Dame Vera --, singer" , "See 14" , "Vera --; King's --" .)