2 looking discontented, musical talent claims (5)
I believe the answer is:
elgar
'2' is the definition.
Both the definition and answer are singular nouns.
Maybe you can see an association between them that I can't see?
'looking discontented musical talent claims' is the wordplay.
'discontented' means to remove the middle letters (the word's contents are removed).
'musical talent' becomes 'ear' (as in 'having an ear' for music).
'claims' means one lot of letters goes inside another.
'looking' with its centre taken out is 'lg'.
'lg' going within 'ear' is 'ELGAR'.
Can you help me to learn more?
(Other definitions for elgar that I've seen before include "man of note" , "Land of Hope and Glory composer" , "British composer, d. 1934" , "Scorer" , "Sir Edward -, English composer" .)