Crossword Genius

Bike on call for several nights at the opera (4,5)

Ross

I believe the answer is:

ring cycle

'several nights at the opera' is the definition.
(series of operas by Richard Wagner)

'bike on call' is the wordplay.
'bike' becomes 'cycle' (synonyms).
'on' is a charade indicator (letters next to each other).
'call' becomes 'ring' (telephone call).
'cycle' after 'ring' is 'RING CYCLE'.

'for' acts as a link.

(Another definition for ring cycle that I've seen is " four evenings of music".)

I've seen this clue in The Times.
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