Possible Clues:

• Like the clue "Mountain: Comb. form" for OREO
• A bit old-fashioned
• Old-fashioned father drinking endless cha
• Went out with note penned by father
• Out ... or went out with
• Like archaeological finds, typically
• No longer up-to-date
• Old-fashioned parent ringing teen on a regular basis
• Saw somewhat rusty?
• Out of fashion, being invited for a tryst