The 22-year-old wrote himself into Bees' folklore with the opener in the 2-0 win at QPR last Friday, capping a man of the match performance at Loftus Road.
Clarke has previously paid tribute to the skipper for looking out for him as he was on the cusp of the first team last season and since becoming a regular in April.
And Dean revealed a chat the pair had in a night club where he passed on some encouragement and is delighted to see Clarke reaping the rewards.
“Clarkey is one I've looked out for and looked after when he was on loan at Barnet,” Dean said.
“We were in a night club and were speaking about football for a long time. I told him to keep going and keep doing what he's doing and he'll get a chance.
“He has and he's taken it and reaping the rewards. He's a great kid with a great attitude and he'll only get better.”