Crossword Genius

French art gallery's windows? (7)

Ross

I believe the answer is:

louvres

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

'french art gallery's windows?' is the definition.
I can't judge whether this definition defines the answer.

'gallery's windows?' is the wordplay.
'gallery' becomes 'louvre' (I've seen this before).
'windows?' becomes 's' (I can't justify this - if you can you should give a lot more credence to this answer).
'louvre'+'s'='LOUVRES'

Can you help me to learn more?

(Other definitions for louvres that I've seen before include "Slats" , "series of flaps" .)

I've seen this clue in the Sydney Morning Herald.
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