A bit isolated (5)

I believe the answer is:

apart

'isolated' is the definition.
(I know that isolated can be written as apart)

'a bit' is the wordplay.
'bit' becomes 'part' (I've seen this before).
'a'+'part'='APART'

(Other definitions for apart that I've seen before include "in isolation" , "in bits" , "aloof" , "Unconnected" , "set aside" .)

I've seen this clue in The Telegraph.

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