I actually thought we'd see a back-three utilised by Clement - at least in some games - because he used a back-three at Club Brugge and even at Monaco he used a situational back-three with the LB staying back and the RB playing further forward.
We've clearly not got the wingers he'd like, but perhaps this shows we've also not got the profile of defender he'd like, either.
(I correct myself: we did see a situational back-three at one point, with Yfeko drafted in at LB. I can't recall the game, though. In any case it didn't last.)