Treating Sheffield chums to a classic performance at The Crucible? (3,7,2,5)

I believe the answer is:

the duchess of malfi

I'm a little stuck... Click here to teach me more about this clue!

'treating sheffield chums to a classic performance at the crucible?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'treating sheffield chums to a' is the wordplay.
'treating' indicates anagramming the letters.
'sheffield'+'chums'+'to'+'a'='sheffieldchumstoa'
'sheffieldchumstoa' with letters rearranged gives 'THE DUCHESS OF MALFI'.

Can you help me to learn more?

(Another definition for the duchess of malfi that I've seen is " Play written by John Webster".)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.