Lights initially extinguished, music perhaps turned up for its performers? (9)
I believe the answer is:
orchestra
'turned up for its performers?' is the definition.
I can't tell whether this definition defines the answer.
'lights initially extinguished music' is the wordplay.
I cannot really understand how this works, but
'music' could be 'tra' (I've seen this in another clue) and 'tra' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'perhaps' acts as a link.
Can you help me to learn more?
(Other definitions for orchestra that I've seen before include "Group of musical instrumentalists" , "Brass, woodwind, strings and percussion" , "many players" , "bandsmen?" , "Big band" .)