The Baggies moved onto the 43-point mark and seventh spot after Saturday's 2-1 home win over Swansea with the help of Romelu Lukaku's 13th goal of the campaign.
Clarke has conceded that Europe may just be beyond Albion but is confident his squad will not take their foot off the pedal in the final quarter of the season.
"The motivation is good. We had a chat before we went to Chelsea last week about moving into the final part of the season," said Clarke. "I asked them to show me at Stamford Bridge that they had the desire to stay in the top half of the table and to push on.
"I saw enough there despite losing 1-0 to know we could look forward to the last 10 games. We showed that last week and showed it against Swansea.
"It was important for the players that they put on a performance like that and important they got three points against a very good Swansea team."
Clarke added: "They have the hunger. This was our ninth win at home, and not many other teams in the division, will have nine home wins.
"We will try to get more points on the board. That is the only focus, the next game and to get as many points between now and the end of the season.
"Swansea have had a fantastic season, deserve all the accolades they get and have won one of the three domestic trophies. But we will look to kick on and finish above them in the table if we can."