Berg of "Lulu" fame (5)
I believe the answer is:
alban
'berg of lulu fame' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for alban that I've seen before include "Saintly type" , "First English Christian martyr" , "-- Berg, composer" , "Saint who was first British Christian martyr" , "First Christian martyr in England" .)