Answer: CRYPTIC

AnswerCrossword Clue
CRYPTICSphinx-like
CRYPTICMysterious
CRYPTICSecret.
CRYPTICMysterious.
CRYPTICMegadeth "... Writings"
CRYPTICLike a London Times crossword clue
CRYPTICObscure
CRYPTICPuzzling
crypticsecret occult
crypticploying cipher or code
cryptichidden (concealed)