The Hawthorns outfit have been chasing the 24-year-old throughout the close-season as head coach Clarke looks to bolster his options.
It is thought that the club are eager to secure the former Swansea City player on a season-long loan deal, and Clarke confirmed that talks are ongoing.
"I know there was initial contact between the clubs and I know there has been continued contact between the clubs," the Scot said.
"Beyond that, I don't know if we are close to a deal or if we are far away from a deal. There are still talks ongoing at this moment in time."
But he is keen to add to his squad and improve on last season's eighth-place finish.
"At the moment, if I could get two more in, I'd be happy," he added.
"And if I could get three more, then I think we'd be set. I'm staying confident."
Clarke's men will open the new campaign at home against Southampton on Saturday.
