How long is Lewis out for? If he's back soon, hopefully he can maintain his promising performances before the injury, and Manquillo can be the alternative.
If that is a release clause, surely it is in one lump sum to secure the player? Otherwise they have the right to reject say, a proposal to pay it over ten years or have to come to an agreement with the buying club, which means it is not certain.
He's the type of striker we are missing even if he is not a big name, and offers a physical presence up front. There were times when Wilson is isolated by himself. Signing him gives us options and different game plans for opponents.