Stage works composed as per Ring (6)
I believe the answer is:
operas
'stage works' is the definition.
(opera is a type of stage work)
'composed as per ring' is the wordplay.
'composed' indicates anagramming the letters.
'ring' becomes 'o' (letter resembling a ring).
'as'+'per'+'o'='aspero'
'aspero' is an anagram of 'OPERAS'.
(Other definitions for operas that I've seen before include "La Traviata, Aida" , "The Magic Flute, Don Giovanni etc" , "These shows are a poser, oddly" , "'La Boheme and La Traviata, say (6)'" , "Musical works" .)