Authentic playing - is it choral? (10)
I believe the answer is:
historical
'authentic' is the definition.
(thesaurus)
'playing is it choral?' is the wordplay.
'playing' indicates anagramming the letters.
'is'+'it'+'choral'='isitchoral'
'isitchoral' anagrammed gives 'HISTORICAL'.
(Other definitions for historical that I've seen before include "Authentic" , "Relating to a past era" , "Dealing with past" , "Based on records" .)