Business relationship (6)

I believe the answer is:

affair

I believe this is a double definition.

'business' is the first definition.
(I've seen this before)

'relationship' is the second definition.
(I know that affair is a type of sexual relationship)

(Other definitions for affair that I've seen before include "See 23" , "scandal" , "Liaison or intrigue" , "Secret sexual relationship" , "Romantic relationship, perhaps illicit" .)

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

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