Winger Clark was making his first senior start for Gloucester against London Irish having appeared as a replacement the week before against the Cardiff Blues.
Gloucester were up against it as they trailed 14-0 at half time, but Clark's memorable long range try gave hope of a remarkable comeback.
It wasn't to be. Despite the 19 year old adding a second try after good work from Eliota Fuimaono-Sapolu and James Simpson-Daniel, Gloucester's second half efforts came up short.
Disappointed as he was after the game, the tries at least gave the speedster some positives to talk about after the game.
"It's always nice to score tries, but when it was on that stage, and it really helped the team to fight their way back into the match, it was just amazing.
"I knew I was going to be involved straight from the off in the week so I was getting my head around that, but I didn't know whether I would start or not.
"So, I was really pleased on Thursday to get the call up to start and, before the match, I was just trying not to mess up to be honest!"
With Gloucester just metres from their own line when Buxton slipped him the ball, he admitted that he could see the Irish defensive cover but just had to go for it.
"I could see the guy coming across and I wasn't sure whether I was going to make it but it was now or never. I had to go for it and it paid off.
And, for his second try, he gives all the credit to Fuimoano-Sapolu and Simpson-Daniel.
"They're both really skillful players and having players like them inside you really opens things up. I just had to get on the end of it to finish it. All credit to them.
"I'd hoped I might get a chance with all the international call ups but, to finish off a couple of tries, was just a massive plus for me."