Knock off the alcove (6)

I believe the answer is:

recess

I believe this clue is a double definition.

'knock off' is the first definition.
(thesaurus)

'the alcove' is the second definition.
(thesaurus)

(Other definitions for recess that I've seen before include "Hollow space" , "Find niche" , "break needed!" , "Small area off the main area" , "Nook for a break from business" .)

I've seen this clue in the Evening Standard.

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