Free places to go, one gathers, in Paris (7)
I believe the answer is:
unloose
'free' is the definition.
(synonyms)
'places to go one gathers in paris' is the wordplay.
I cannot really understand how this works, but
'one' could be 'un' (northern English dialect form of 'one') and 'un' is found in the answer.
'places to go' could be 'loos' (places to go to the toilet) and 'loos' is present in the answer.
A single letter 'e' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
(Other definitions for unloose that I've seen before include "Set free" , "Release" , "Let free" .)