Answer: sealingwax

AnswerCrossword Clue
SEALINGWAXLetter closer of yore
SEALINGWAXOld-style letter closure
SEALINGWAXOld-style letter closer
SEALINGWAX"Of shoes and ships and ...."
SEALINGWAXItem on the Walrus' list of "many things."
SEALINGWAXAssociate of "cabbages and kings."
SEALINGWAXMedium for a sigil.
SEALINGWAXOtary becomes document closure
SEALINGWAXGum predecessor
SEALINGWAXIt adds a decorative touch to envelopes