Answer: crypto

AnswerCrossword Clue
CRYPTOSecret supporter
CRYPTOWord form for "secret"
CRYPTOHidden: Prefix.
CRYPTOSecret member of a sect
CRYPTOPuzzling prefix for "gram"
CRYPTOGram starter?
CRYPTOWith "gram," a word puzzle
cryptoperson who secretly supports or adheres to a group, party, or belief
cryptosecret or hidden; not publicly admitted
cryptoone who belongs secretly to a group