Play in Wagner opera (4)

I believe the answer is:

rope

'play' is the definition.
(thesaurus)

'in wagner opera' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ROPE' can be found hidden inside 'wagner opera'.

(Other definitions for rope that I've seen before include "Give a man enough . . . . and he'll hang himself" , "Tier" , "'Cable, cord (4)'" , "murder weapon" , "Hitchcock film" .)

I've seen this clue in The Telegraph.

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