Crossword Genius

Female singer -- one supporting large festival (6)

Ross

I believe the answer is:

divali

'festival' is the definition.
(Hindu festival)

'female singer one supporting large' is the wordplay.
'female singer' becomes 'diva' (term for a famous opera singer).
'one' becomes 'i' (Roman numeral).
'supporting' is a charade indicator (letters next to each other) (in a down clue, some letters go below others).
'large' becomes 'l'.
'i' put after 'l' is 'li'.
'diva'+'li'='DIVALI'

(Another definition for divali that I've seen is " Hindu festival; via lid (anag.)".)

I've seen this clue in The Telegraph.
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