The match, which took place at Vale Park, saw summer signing Elijah Adebayo grab the only goal of the game early in the second-half as he increased his scoring tally to three and helped his side to take all three points.
Clarke admitted that he was delighted with the Saddlers' defensive display - the Reds securing a seventh clean sheet in the league - but was unhappy with his team’s possession of the ball.
Speaking via the Express & Star, Darrell said; "We have to be better with our back to play, strikers look after the ball. I can’t remember how many times we’ve given the ball away with our back to play.
"Just keep the ball, find the pass, make another movement. The basics of possession football. It’s something we have to look at and obviously improve on.
"Against Chelsea I thought for 70 minutes we were outstanding with the ball, moving it on the front foot. But it’s three points away from home which in this league is very hard to come by.
"We’ll take the positives, I know I’m just a miserable git but it’s just the way I am."