The hosts dominated large parts of the match but Clarke insisted it would have been "a travesty" if his side had lost, after their late rally.
"I'm really pleased with the boys," Clarke told Sky Sports.
"We spoke a bit at half-time about them having belief in themselves and going out there to play the football that we want them to play - on the front foot and positive - and they went out and did that second half.
"It would have been a travesty if we had lost the game.
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"I'm pleased we got the 1-1 in the end because when you go a goal down late on it is difficult to chase the game but we still managed to do that and get something out the game which is pleasing.
"In the first half Tottenham dominated the game and controlled it. They had all the possession but ultimately didn't have too many shots on target, just a few efforts flying across the box and we got a couple of key blocks but Ben Foster didn't have that many saves to make."
Clarke was keen to draw attention to the impact that striker Romelu Lukaku had on the game, with the on-loan Chelsea man following up his goalscoring performance against Liverpool last week with another fine individual display after coming on as a substitute.
"Even before Lukaku came on we were right in the game, gaining momentum and starting to pass it through the midfield, which was important," he continued.
"Then he did give us a different dimension up front and certainly made it difficult for the two central defenders at that stage of the game."
Many tipped West Brom to struggle this season, but Clarke isn't surprised by the Baggies' bright start to the new campaign, putting it down to the togetherness shown by the squad.
He continued: "There's a great spirit here, we have made a good start.
"I can't say I'm surprised by what we've done because I know what the players are capable. If they keep playing like that and believing in themselves it could be a good season for us."