Glasgow prop George Turner has been backed to learn from the dangerous tackle that earned him a four-match ban.
The Scotland forward was handed an additional punishment after being sin-binned against Champions Cup opponents Montpellier last month.
He was charged with “playing an opponent without the ball” after slamming into Louis Picamoles.
But he now returns to Dave Rennie’s line-up for Sunday’s Pool Three clash with Leinster in Dublin after serving his suspension.
Glasgow forwards coach Jonathan Humphreys admits the 25-year-old had crossed the line last time out but believes Turner will keep himself out of trouble in the future.
He said: “People forget that he hasn’t played a lot of rugby and is relatively young but he’s been fantastic for us this year.
“He’s learned from what happened and understands he was probably a little bit on the edge there.
“We’re looking forward to having him back, though, as he adds a lot to our team.”
Glasgow may be running riot in the Guinness PRO12 but their European campaign is already over as they have lost all four of their games so far.
But head coach Rennie is looking to restore some pride when they make the trip across the Irish Sea.
The Kiwi said: “We travel to Dublin to face the best side in our pool and one of the best sides in the whole competition.
“We’ve had a good week of training and it’s an opportunity for us to show what we’ve learned.”
Rennie had been hoping to have Stuart Hogg involved against Leinster but the full-back will have to wait until next week’s visit of Exeter before making his return from a hip injury.
Turner joins Jamie Bhatti and Siua Halanukonuka in the front row, with captain Rob Harley locking in alongside Greg Peterson.
Adam Ashe, 24, is the oldest member of an exciting back row as he starts next to youngsters Matt Smith and Matt Fagerson.
Nick Grigg and Huw Jones remain in midfield, while Peter Horne starts at fly-half, teaming up with Ali Price.
Meanwhile, wings Lee Jones and Niko Matawalu will play either side of Ruaridh Jackson at full-back.