The former Manchester United midfielder looks set to join Watford permanently.
The midfielder is thriving after being handed the freedom to get forward at Watford - a luxury he wasn't afforded under Koeman at Everton.
Cleverley has impressed since leaving Everton for Watford on loan in January.
The January transfer window is already proving to be a highly successful one for Everton Football Club.
Many of the signings from the Roberto Martinez era have proven inadequate this season.
Everton-owned Tom Cleverley has made a strong start with Watford.
Watford have signed Tom Cleverley on loan from Everton until the end of the season.
The Everton player is heading to Watford according to reports.
Sunderland are believed to be weighing up making a bid for Everton's Tom Cleverley.
Newcastle United have reportedly identified Everton's Tom Cleverley as a potential signing in the January transfer window.