A dateline otherwise set apart (9)

I believe the answer is:

alienated

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'apart' is the definition.
(thesaurus)

'a dateline otherwise' is the wordplay.
'otherwise' indicates anagramming the letters.
'dateline' with letters rearranged gives 'lienated'.
'a'+'lienated'='ALIENATED'

'set' acts as a link.
This may not be right. It may be part of another bit of the clue.

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(Other definitions for alienated that I've seen before include "disaffected" , "Estranged" , "divorced" , "put off" , "Date Liane (anag.)" .)

I've seen this clue in The Mirror and The Daily Express.

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