Crossword Genius

The young girl tries to stay afloat (3)

Ross

I believe the answer is:

flo

I'm a little stuck... Click here to teach me more about this clue!

'the young girl' is the definition.
'Flo' can be an answer for 'girl' (short for Florence). I am not sure about the 'the young' bit.

'tries to stay afloat' is the wordplay.
'FLO' is hidden in amongst the letters.
But, I am uncertain how this is indicated.

Can you help me to learn more?

(Another definition for flo that I've seen is " Nightingale".)

I've seen this clue in the Evening Standard.
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