Outsider, alternatively one who transfers property (7)

I believe the answer is:

alienor

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'one who transfers property' is the definition.
The definition suggests a singular noun which matches the answer.

'outsider alternatively' is the wordplay.
'outsider' becomes 'alien' (I've seen this before).
'alternatively' becomes 'or'.
'alien'+'or'='ALIENOR'

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(Other definitions for alienor that I've seen before include "Property expert" , "One disposing of property" .)

I've seen this clue in The Telegraph.

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