Underground venue changing poles for street performer (6)
I believe the answer is:
busker
'for street performer' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for busker that I've seen before include "Public entertainer" , "Street entertainer" , "Street performer" , "Street musician" , "player in street" .)