Answer: holygrail

AnswerCrossword Clue
HOLYGRAIL

Much-sought ideal

HOLYGRAIL

Lancelot's quest

HOLYGRAIL

Vessel at the Last Supper

HOLYGRAIL
Object of many medieval quests
HOLYGRAIL
Object of a classic pursuit
HOLYGRAILSubject in Tennyson's "Idylls of the King"
HOLYGRAILFamed chalice
HOLYGRAILObject of a quest
HOLYGRAILLegendary chalice