The Baggies went down 2-0 at home to Norwich on Saturday to make it three defeats in a week, a result that leaves them only a couple of points above the relegation zone.
Games against Cardiff and Hull are next on their Premier League schedule and Clarke insists his players are going to have to start rolling their sleeves up to get out of their predicament.
"There is no other way," he said. "It's been a difficult week for us. Three defeats in a week is sore, it's painful.
"It's hard to take but next week we have to go to Cardiff, we have to be resilient and we have to start getting points on the board.
"There is no easy solution. This was two teams who had not been getting the best results recently, feeling each other out.
"From nowhere they got that first goal, it gave them something to hang on to and set us back a bit."