Not widely known (6)
I believe the answer is:
arcane
(Other definitions for arcane that I've seen before include "Mysterious, secret or obscure" , "Abstruse, mysterious" , "Ace ran, being mysterious" , "Recondite" , "Esoteric, mysterious" .)
I believe the answer is:
arcane
(Other definitions for arcane that I've seen before include "Mysterious, secret or obscure" , "Abstruse, mysterious" , "Ace ran, being mysterious" , "Recondite" , "Esoteric, mysterious" .)