Could be Mr Right (5)

I believe the answer is:

title

I'm a little stuck... Click here to teach me more about this clue!

'right' is the definition.
(I know that title is a type of legal right)

I can't explain the rest of the clue.

(Other definitions for title that I've seen before include "Name; heading" , "Right of ownership" , "'The name of a book, say (5)'" , "Handle" , "big role" .)

I've seen this clue in the Evening Standard.

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