Music by Moonlight? (6)
I believe the answer is:
sonata
This clue might be a double definition.
'music' is the first definition.
(sonata is a kind of music)
'moonlight?' is the second definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for sonata that I've seen before include "Instrumental work" , "Musical composition for one instrument or two" , "just for one or two players?" , "Musical composition with three or more contrasting movements" , "Music to play (not sing)" .)