Distance Parisian is to roam (8)
I believe the answer is:
estrange
'distance' is the definition.
(both can mean to create distance or separation)
'parisian is to roam' is the wordplay.
'parisian is' becomes 'est' ('is' in French).
'to roam' becomes 'range' (range can mean to roam around).
'est'+'range'='ESTRANGE'
(Other definitions for estrange that I've seen before include "Become unfriendly towards sergeant" , "turn away?" , "disunity" , "Drive away" , "split up?" .)