Go in van, moving to French city (7)
I believe the answer is:
avignon
'to french city' is the definition.
(I've seen this before)
'go in van moving' is the wordplay.
'moving' indicates anagramming the letters (letters are moved around).
'go'+'in'+'van'='goinvan'
'goinvan' anagrammed gives 'AVIGNON'.
(Other definitions for avignon that I've seen before include "European city" , "City of SE France" , "French town with a 17 dn mentioned in song" , "Les Demoiselles d'here, Picasso" , ""Sur le pont d'______ on y danse, on y danse"" .)