Man resounds with stirring operatic aria (6,5)
I believe the answer is:
nessun dorma
'operatic aria' is the definition.
'man resounds with stirring' is the wordplay.
'with stirring' indicates an anagram.
'man'+'resounds'='manresounds'
'manresounds' anagrammed gives 'NESSUN DORMA'.
(Other definitions for nessun dorma that I've seen before include "Well-known aria from Turandot" , "Famous Puccini aria (Turandot)" , "air" , "Aria from Puccini's opera Turandot" .)