Crossword Genius

Opera in F? Perhaps (8)

Ross

I believe the answer is:

pinafore

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'opera in f perhaps' is the definition.
I can't tell whether this definition defines the answer.

'opera in f perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'opera'+'in'+'f'='operainf'
'operainf' with letters rearranged gives 'PINAFORE'.

Can you help me to learn more?

(Other definitions for pinafore that I've seen before include "Sort of apron" , "Apron-like garment" , "It protects female worker" , "gives homely protection" , "Protective garment; a stage ship" .)

I've seen this clue in The Globe and Mail.
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