What you hope to see through sunglasses? Water in Cannes, having just arrived there (7)
I believe the answer is:
nouveau
'cannes having just arrived there' is the definition.
I know nothing about this answer so I can't tell whether this works.
'what you hope to see through sunglasses? water' is the wordplay.
I cannot really see how this works, but
'you' could be 'u' (homophones) and 'u' is found in the answer.
'see' could be 'v' (short for 'vide', Latin meaning 'see elsewhere') and 'v' is located in the answer.
'water' could be 'eau' (I have seen 'French water ' mean 'eau' so perhaps 'water' could also mean 'eau') and 'eau' is found in the answer.
The remaining letters 'no' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for nouveau that I've seen before include "latest" , "like young Beaujolais" , "It's new in France" , "up to date" , "New to the French" .)