Aster? Write music about it (9)
I believe the answer is:
composite
'aster?' is the definition.
The definition and answer can be both plants as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'write music about it' is the wordplay.
'write music' becomes 'compose' (synonyms).
'about' indicates putting letters inside.
'compose' placed around 'it' is 'COMPOSITE'.
Can you help me to learn more?
(Other definitions for composite that I've seen before include "Made up of different elements" , "Motion" , "Made up of several distinct parts" , "An amalgam, made up of two or more parts" , "Formed of distinct parts" .)