Possible Clues:

• Secret remedies or elixirs
• Either of the two divisions (the minor -- and the major --) of a pack of tarot cards
• An artist holds tin for secrets
• Secrets from an artist turned up where the wine appeared miraculously
• Secret knowledge
• Things understood by few
• These mysteries, in particular, can amaze
• Secret things
• A church has articles on mysteries
• Able to get some secrets into such an eminent artist? (6)