The defender will leave boyhood club Chelsea when his contract officially expires at the end of this month, after a long association with Stamford Bridge.
He spent last season on loan at Coventry City, coming up against the Blades, and was discussed as a good option for left centre-half, an area United are now light in following Ben Davies’ return to Liverpool and amid Jack O’Connell’s continued fitness battle.
And City were interested in bringing him back on a permanent basis. But, as The Star reported recently, it was a two-horse race between Coventry and another Championship club – and not United – for Clarke-Salter’s services.
Clarke-Salter knows new QPR boss Michael Beale from their time together working at Stamford Bridge, with Beale a former Chelsea youth coach.