Flutes surround another instrument (4)
I believe the answer is:
lute
'instrument' is the definition.
(lute is a kind of instrument)
'flutes surround another' is the wordplay.
'LUTE' is hidden in amongst the letters.
But, I'm uncertain how this is indicated.
Can you help me to learn more?
(Other definitions for lute that I've seen before include "Stringed instrument shaped like a halved egg" , "clay" , "Ancient stringed instrument" , "Old musical instrument" , "Old plucked instrument" .)