Clarke felt Albion deserved the victory which kept alive their hopes of securing a European spot.
He said: "We got a lucky break but sometimes when you put in the effort, energy and quality we did into that game...I think we earned that little break.
"We deserved to win the game. Don't be writing down that we didn't deserve to win the game.
"I'm delighted because we came from behind. We don't do it very often and in the Premier League there are not too many teams that can do it.
"When you go behind in this league, it is difficult - especially against a team with the quality of Swansea."