Singer Fogelberg (3)
I believe the answer is:
dan
'singer fogelberg' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dan that I've seen before include "Karate expert" , "The 19's first archer" , "Expertise level in juso" , "-- Dare, comic hero" , "Black-belt grade of proficiency" .)