In the following example sentences the word “a” is used correctly, however I am having trouble explaining why to a non-native speaker:
“Never had more handsome a man walked the earth.”
“And what more perfect a way to end the event?”
“More powerful a witch the world has never seen.”
I’m aware these sentences might be considered ‘literary’ and few people would converse in such terms, but I could do with some help deconstructing and justifying the use of “a” in this form.