Henry Purcell and Benjamin Britten wrote operatic works based on this play (1,9,6,5)
I believe the answer is:
a midsummer nights dream
'henry purcell and benjamin britten wrote operatic works based' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'on this play' is the wordplay.
I cannot quite see how this works, but
'on' could be 're' ('on' can be mean 'with reference to') and 're' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for a midsummer nights dream that I've seen before include "Shakespeare play" , "Drama" , "one comes to in the warm weather after this?" .)