Context: French international footballer Karim Benzema has recently been implicated in the blackmail of another French player, Valbuena. It is undetermined if Benzema's intentions were to merely warn his teammate or to help facilitate the blackmail. Apparently, one of the key phrases he says is:
"Je vais t'arranger la sauce"
One Spanish magazine translated the line as
I can help you
But I saw some French speakers scoff at the translation as too generous. To me, "Je vais t'arranger la sauce" sounds like Benzema is cooking spaghetti for Valbuena or something. What is the meaning conveyed by this line, given the context? Particularly, what does "la sauce" mean here"?