Spot the Queen band member, perhaps (5)
I believe the answer is:
piper
'band member perhaps' is the definition.
I can't tell whether this defines the answer.
'spot the queen' is the wordplay.
'spot' becomes 'pip' (both can mean a small amount).
'the queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'pip'+'er'='PIPER'
Can you help me to learn more?
(Other definitions for piper that I've seen before include "John --, 20th century English artist" , "If you pay him, call the tune" , "Artist known for his stained glass in Coventry Cathedral, d. 1992" , "One playing wind instrument" , "Bagpipes player" .)