Girl's name in title of song.

[RachelAnne]

You picked a fine time to leave him ! (4)
Please help - this answer surely should be Lucille but
it definitely says four letters.

[Postdog]

I agree, but he also had a hit with Ruby, which'd fit - maybe it's a cryptic clue.

The song would sorta fit too...

[RachelAnne]

Thanks Postdog - that does make sense.

[jared25]

Perhaps the compiler thinks its Lucy instead of Lucille

[RachelAnne]

That is a possibility but I already have Lucy as the answer to another question.