Part with a lover! (5)

I believe the answer is:

romeo

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

'lover' is the definition.
(I know that Romeo is a type of lover)

I don't understand how the rest of the clue works.

(Other definitions for romeo that I've seen before include "Famous lover" , "Code word for the letter R" , "Juliet's lover of Verona" , "A great lover" , "his tragedy one was late?" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app