..in Paris, she can go either way! (4)
I believe the answer is:
elle
'in paris she' is the definition.
('she' in French)
'go either way' is the wordplay.
'go either' becomes 'ell' (I can't justify this - if you can you should give a lot more credence to this answer).
'way' becomes 'e' (Compass direction - East).
'ell'+'e'='ELLE'
'can' acts as a link.
Can you help me to learn more?
(Other definitions for elle that I've seen before include "Ms MacPherson, supermodel" , "French word for 'she'" , "Fashion magazine - the French "She"" , "World's best-selling fashion magazine" , "Is she in France" .)