Spectacular gesture's most generous (7)

I believe the answer is:

largest

'most generous' is the definition.
('large' can be similar in meaning to 'generous')

'spectacular gesture's' is the wordplay.
'LARGEST' is hidden within the letters.
However, I am unsure how this is indicated.

(Other definitions for largest that I've seen before include "Superlatively extensive" , "Biggest" , "Most substantial" , "Extremely generous" , "Greatest in size" .)

I've seen this clue in The Independent.

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