Saw it once in TV format, probably mid 90s. The guy is going a bit crazy, wants to give up on that carrier but they pressure him to take just one more job to kill a lady nobody could as they all fall for her. His apprentice kills her at the end just when the main guy was renegotiating to pay her debt.
Music them : Love is all around by Troggs.
Anybody knows the movie?
Wild Target (1993)
https://www.imdb.com/title/tt0106573/
It was also remade in 2010