Genuine couple's qualities (10)

I believe the answer is:

properties

'qualities' is the definition.
(property can mean a quality or trait)

'genuine couple's' is the wordplay.
'genuine' becomes 'proper' (I've seen this before).
'couple's' becomes 'tie's' (both can mean to join).
'proper'+'ties'='PROPERTIES'

(Other definitions for properties that I've seen before include "Houses" , "Attributes" .)

I've seen this clue in The Telegraph.

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