Dorrans had been linked with a move away from The Hawthorns, but after a transfer failed to materialise, Clarke has revealed that the Scottish international has continued to work hard in training.
The 49-year-old told the Birmingham Mail: "Graham has done well. We had a chat before Christmas and we said then that if a suitable offer came up in January we would consider it.
"Nothing did come up. He's knuckled down and I told him in December that he still had an important part to play for the team.
"I think that's proved to be the case as the season has gone on."
The 25-year-old joined the Baggies from Livingston in 2008.