Rosalie's little girl (3)

I believe the answer is:

sal

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

'girl' is the definition.
(feminine given name)

'rosalie's little' is the wordplay.
'SAL' is hidden within the letters.
However, I'm unsure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for sal that I've seen before include "girl?" , "- - volatile" , "Sarah (dim.)" .)

I've seen this clue in the Evening Standard.

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