Answer: endsit

AnswerCrossword Clue
ENDSIT

Breaks up

ENDSIT

Calls the whole thing off

ENDSIT

Stops going out

ENDSIT
Writes John a letter?
ENDSIT
Calls things off
ENDSITRings down the curtain
ENDSITBreaks up with a lover
ENDSITThrows him out, say
ENDSITBreaks up, informally
ENDSITBreaks up a relationship
ENDSITAdmits defeat
ENDSITCalls off the romance
ENDSITWrites a Dear John letter, say
ENDSITGives back the engagement ring, e.g.
ENDSITBreaks things off
ENDSITBreaks off a relationship
ENDSITSays goodbye to a lover
ENDSITBreaks off a romantic relationship