Clough worked with Maguire when in charge of Sheffield United.
He told the Burton Mail: "The one thing we encouraged him to do was to bring the ball out.
"If you look back, especially some of the cup games against higher-league opposition, he used to bring the ball out and create stuff for us all the time.
"He's a very good lad, and he's a threat in the opposition penalty area - he really wants to go and head it in the opposition penalty area.
"We were actually bottom of the league at the time, we went to Fulham for a replay on the Tuesday night, it was 120 minutes, we got a corner, he won it and headed it across, and Shaun Miller headed it in from a yard.
"He was instrumental in that and getting us going."
Clough added: "You know they're good, and then it's just how far they can go.
"But I think Harry's dedication and things like that, his attitude was always spot on, and he wanted to win.
"He's a quiet lad, but he wanted to win."