Lead-in to "sesame" or "secret" (4)
I believe the answer is:
open
(Other definitions for open that I've seen before include "ready to entertain new ideas" , "Widely known" , "Not yet decided - to start" , "Candid or unlocked" , "Frank; unfold" .)
I believe the answer is:
open
(Other definitions for open that I've seen before include "ready to entertain new ideas" , "Widely known" , "Not yet decided - to start" , "Candid or unlocked" , "Frank; unfold" .)