Gera gave the visitors the lead after 30 minutes and Clarke was delighted with his impact behind lone striker Shane Long.
Long, Romelu Lukaku and Marc-Antoine Fortune all went on to find the back of the net but the Scottish boss believes that the playmaker deserved the man of the match award.
|2/1||WBA are 2/1 with William Hill to beat Swansea on Wednesday night|
"For me, Zoltan was man of the match," Clarke told the club's official website. "He was outstanding. Zoltan played the number 10 position like a dream for us.
"The way we played and passed it, we kept getting him on the ball in good positions. It's something we had spoken about before the game. Thankfully it worked for us."
West Brom's latest victory lifted them to third place in the Premier League, although Chelsea have the opportunity to rise back above the Midlands club when they face Manchester City on Sunday.