The Scots were knocked out of Euro 2024 after suffering an agonising 1-0 defeat to Hungary in their final group game on Sunday (23.06.24) and Clarke felt that a blunt attack that managed only two goals contributed to yet another exit at the first hurdle.
The coach said: "It's very difficult to sit here and analyse, but sometimes after a defeat like that you need a bit of time just to digest everything and work out how the game went, why it went how it did.
"We didn't create enough, but we did create enough to score a goal. That's clear. Is that why we went out of the tournament?
"We scored two goals this tournament, we scored one last time. It's one for me to go away and talk to my coaches about, about how we can score more goals at certain times in games of course."
Clarke was angered by the decision made by Argentine referee Facundo Tello not to award a penalty for what seemed to be a foul on Stuart Armstrong in the second half and also questioned why VAR failed to intervene in the incident.
The Scotland boss said: "100 per cent penalty. Somebody somewhere has to explain to me why that's not a penalty. It's 100 per cent a penalty.
"It's a one-goal game, we get the penalty, it could be a different night. I've got other words, but I'm not going to use them.
"It's a European competition, it might have been better to have a European referee. The VAR was European, maybe the referee didn't see the foul clearly on the pitch, but what's the point in VAR if they're not going to come in on something like that. It was a penalty."
