Spooks (6)

I think it could be either:

agents

scares

'spooks' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for scares that I've seen before include "Frightens or intimidates" , "Causes fear" , "Terrifies" , "Affrights" , "Alarms" .)

I've seen this clue in The Sun and the Sydney Morning Herald.

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