She sounds a bit faint (3)

I believe the answer is:

fay

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'a bit faint' is the definition.
The definition suggests a singular noun which matches the answer.

'she sounds' is the wordplay.
'she' becomes 'fey'.
'sounds' shows a homophone (sound like).
'fey' sounds like 'FAY'.

Can you help me to learn more?

I've seen this clue in the Evening Standard.

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