Crossword Genius

One apt to swoon, being weaker? (7)

Ross

I believe the answer is:

fainter

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'weaker?' is the definition.
('faint' can be similar in meaning to 'weak')

'one apt to swoon' is the wordplay.
'one apt' becomes 'er' (I can't justify this - if you can you should believe this answer much more).
'to' says to put letters next to each other (I've seen this in other clues).
'swoon' becomes 'faint' (synonyms).
'er' put after 'faint' is 'FAINTER'.

'being' acts as a link.

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I've seen this clue in the Evening Standard.
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