So one of my players is playing a full on Charm technique master - Persuasion 5 (Charm 3B) with the Adept Negotiator, Charismatic, Compelling, and Magnetic qualities. That breaks down to a 5D+3B+2 check (with no penalty from Disposition) dealing 6 influence damage per degree that improves the target's disposition by 3 steps once they're defeated. That's potentially good enough to bump a relatively average opponent from Malicious to Indifferent in one exchange. Pretty nuts. That said, his Intrigue Defense and Composure aren't anything above just "pretty good", so he's not a total Intrigue monster - he's just damn good at making friends wherever he goes.
Now this character's also completely and utterly useless in combat. Like Fighting 1, Marksmanship 1, Endurance 2 useless. That said, if he were to be able to get a word in, I'm sure the people trying to kill him would see that it's all just a misunderstanding and that maybe they can work this out!

I'd like to give him the chance to pull that off now and then.
Is it possible to play out an intrigue mid-combat? What's the best way to do so? On the flipside, how can I prevent him from turning every single fight into a negotiation and robbing the more combat-capable characters of their moments in the spotlight?