Clarke guided Bristol Rovers to two promotions during his first spell in the dugout at the club, before returning this summer following their relegation from League One.
They host fifth-placed Notts County on Saturday (15:00 GMT) and the 47-year-old said he did not come back to the club to “ruin” his legacy.
“I came back to be successful and I’m giving everything, my staff are giving everything,” he added.
“We’re going through a really tough time of things at the minute, thank the supporters for sticking with us, get behind us on Saturday [and we can] hopefully put in a performance we can be proud of and make sure the negativity around the place is solely on my shoulders, to make sure that my group get winning football games.
“We all understand the situation we’re in and we all understand it’s up to me to get the team performing.”