The Belgian striker has joined the Baggies on loan from Chelsea and after a disappointing debut campaign with the Blues, is determined to prove himself at The Hawthorns with Clarke hoping he can shine.
"He's certainly hungry, I know that," said Clarke. "He wants to do well and prove himself in the Premier League.
"But he's got a clean slate this year. He's one of a number of strikers competing for a place in my team and I'm hoping that at the end of this year he's not complaining about anything."