Aston Villa were able to beat Birmingham City 1-0 on Tuesday night, but their performance was far from faultless.
Clark played the entire first-half in an unfamiliar defensive midfield role, and did not get involved in the game, with Villa booed off at half-time.
Although they improved after Clark was moved back into defence for the second-half, and eventually won the tie due to a Rudy Gestede header, Yorke was still less than impressed with Sherwood's team selection.
"You're playing Ciaran Clark in midfield, but what is he?" Yorke questioned. "What is he bringing to the team? You are the home team, and the onus is on you."
Villa were way off the pace in the first-half, with the team seemingly content to lump the ball up to Gestede and feed off his knock downs.
They lacked tempo and creativity, and it was hardly surprising to hear them given such hostile reception once the referee below the half-time whistle.
Sherwood did look to make amends for any errors he may have made within his starting line-up at the interval, by bringing on Jack Grealish and Jordan Ayew for the second period - and the duo helped to change the game.
Grealish and Ayew injected a bit of spark into Villa's attack play, and they ultimately deserved their victory - after a decent second-half showing.