Ghost that can give you the creeps around opening time (7)

I believe the answer is:

spectre

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'ghost' is the definition.
('spectre' can be a synonym of 'ghost')

I don't understand the remainder of the clue.

(Other definitions for spectre that I've seen before include "something seen as a threat" , "Enemy organisation for James Bond; ghost" , "Sceptre (anag.)" , "Ghost, phantom, apparition" , "'Phantom, shade (7)'" .)

I've seen this clue in the Evening Standard.

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