About to be defeated and shut (5)

I believe the answer is:

'shut' is the definition.
(I know that shut can be written as close)

'about to be defeated' is the wordplay.
'about' becomes 'c' (abbreviation for circa).
'to be defeated' becomes 'lose' (I've seen this before).
'c'+'lose'='CLOSE'

'and' acts as a link.

(Other definitions for close that I've seen before include "seal" , "Meeting with a UFO?" , "Shut - sultry" , "Airless" , "N ear; shut" .)

I've seen this clue in The Mirror.

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