A bit to one side (5)

I believe the answer is:

apart

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

'a bit' is the wordplay.
'bit' becomes 'part' (both can mean a piece of something).
'a'+'part'='APART'

(Other definitions for apart that I've seen before include "In private" , "out on a limb?" , "cut off from others" , "In pieces; separate" , "Asunder" .)

I've seen this clue in The Guardian and the Evening Standard.

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