Section of Manhattan Mahler composed (6)
I believe the answer is:
harlem
'section of manhattan' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Maybe there's a link between them I don't understand?
'mahler composed' is the wordplay.
'composed' indicates anagramming the letters.
'mahler' with letters rearranged gives 'HARLEM'.
Can you help me to learn more?
(Other definitions for harlem that I've seen before include "Part of New York City" , "New York neighbourhood" , "'District of Manhattan, noted for jazz clubs (6)'" , "Area of New York city" , "NY community" .)