Girl's name for a musical instrument (7)

I believe the answer is:

celeste

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

'musical instrument' is the definition.
'celeste' can be an answer for 'instrument' (I've seen this before). I am not certain of the 'musical' bit.

'girl's name for a' is the wordplay.
'girl's name' becomes 'Cele'.
'for a' becomes 'ste' (I can't justify this - if you can you should give a lot more credence to this answer).
'cele'+'ste'='CELESTE'

Can you help me to learn more?

(Other definitions for celeste that I've seen before include "Marie -, ill-fated ship" , "The Mary - - (ghost ship)" , "Keyboard instrument" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.