When I saw the "chevaliers", I thought the answer could be an explosive song (the dynamite as the 1st clue), what is Montségur, but then, when I saw that the right song to guess was Isle Of Avalon, I didn't understand at first what some corn flakes had in common with dynamite, the guy called Tim and the knights, but I got it only after @MindRuler's answer and your post explaining the clues.Thank you @TheMercenary
I thought you had it.
You 3rd clue was about James Bond and Austin Powers... So, I thought about this band https://austinjamesandthenomads.com/ and Maiden's song called "The Nomad" and I made the link...No....mad