Powerful piece from rock band (5)
I believe the answer is:
queen
This clue is a double definition.
'powerful piece' is the first definition.
(I've seen this in another clue)
'rock band' is the second definition.
(British rock band)
'from' is the link.
(Other definitions for queen that I've seen before include "Powerful woman" , "Female monarch" , "Female cat" , "Sovereign - bee" , "who collaborated musically with 14 [BOWIE]" .)