"He's trained Tuesday and Thursday, sat on the bench time after time, and refused to play for the second team because he wanted to stick with us because he knew he was good enough.
"He got his chance and came in for some of the toughest games in the league supposedly, and he's been brilliant."
Clague was especially impressive in the Blues' most recent 3-0 home win against Forrest Hill-Milford, holding his ground despite a disproportionate amount of play coming down his side.
"He deserves a lot of credit," O'Regan said.
"This was a game he could have hid from - young guys tend to do that - but he showed that he is strong."
Clague is relishing his time at the club, but still plays for his school when he can.
"When I play for the club I don't play with those boys because I have to rest up," Clague said.
"When I can I will but my main focus at the moment is with these boys and trying to secure my spot in the team. It's definitely a step up."