Collaborator with an occupying enemy (8)

I believe the answer is:

quisling

(Other definitions for quisling that I've seen before include "(Norwegian) WWII collaborator" , "Collaborator with an occupying force" , "Judas?" , "Traitor who aids an occupying enemy force" , "Traitor aiding an occupying enemy force" .)

I've seen this clue in The Guardian.

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