Quit the side (4)

I believe the answer is:

left

I believe this clue is a double definition.

'quit' is the first definition.
(I've seen this before)

'the side' is the second definition.
(I've seen this before)

(Other definitions for left that I've seen before include "Vacated; political wing" , "split" , "Outstanding" , "Departed, went away" , "One < side" .)

I've seen this clue in the Evening Standard.

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