Traitor in Paris who attracts support (8)
I believe the answer is:
quisling
'traitor' is the definition.
(quisling is a kind of traitor)
'paris who attracts support' is the wordplay.
'paris who' becomes 'qui'.
'attracts' says to put letters next to each other.
'support' becomes 'sling' (sling is a type of support for member (ie an arm)).
'qui'+'sling'='QUISLING'
'in' acts as a link.
(Other definitions for quisling that I've seen before include "Traitor who aids an occupying enemy force" , "Traitor to country, after proNazi Norwegian" , "Traitor collaborating with the occupying enemy" , "Judas?" , "Traitorous collaborator" .)