Nigel's one and only composition (6)
I believe the answer is:
single
'only composition' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe there's an association between them I don't understand?
'nigel's one' is the wordplay.
'nigel's' can be anagrammed to 'SINGLE'.
But, I am not clear how this is indicated.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for single that I've seen before include "Sort of person" , "Like bachelor" , "Concentrating on only one aim" , "A hit for one run in cricket" , "Not one of several" .)