They may be wide open (6)

I believe the answer is:

spaces

'they may be wide open' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for spaces that I've seen before include "Empty areas" , "Blank areas" , "Intervals" , "cleared areas" , "Open areas" .)

I've seen this clue in the Evening Standard.

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