Little girl's name for a flower part (3)

I believe the answer is:

flo

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This could be a double definition.

'little girl's name' is the first definition.
(short for Florence)

'flower part' is the second definition.
The definition suggests a singular noun which matches the answer.

'for a' acts as a link.

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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