Macheda grabbed a goal in each half, making it three goals in two games for City since signing on loan at the end of January.
Blues boss Clark explained: "I lost five players on loan on New Year's Day and had to rebuild the squad.
"It took a while and we lost three league games which knocked the stuffing out of us.
"Luckily I was able to recruit new players and they have done very well for us.
"I only hope they don't do so well and they go then go back early."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball