Crossword Genius

Never dating, wife leaves unpaid (7)

Ross

I believe the answer is:

ageless

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'unpaid' is the definition.
Both the answer and definition are adjectives. Perhaps you can see an association between them that I can't see?

I can't explain the remainder of the clue.

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(Other definitions for ageless that I've seen before include "not appearing to get old" , "Not appearing to grow older" , "not getting on" , "Not growing older" , "Lasting forever" .)

I've seen this clue in The Sunday Times and The Times.
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