With less than three weeks of the transfer window remaining, Baggies boss Clarke is optimistic Olsson will stay at the club.
"There has been no indication that Jonas is going to leave us," said Clarke.
"Over the summer he's worked well, played games and played with his normal 100 per cent commitment.
"He's got a year left on his contract so he's not a free transfer so as far as we're concerned Jonas is under contract and will be with us next season.
"There is nothing that's happened over pre-season to change our mind on that."