Much-sought goal (4,5)

I believe the answer is:

holy grail

(Other definitions for holy grail that I've seen before include "Legendary cup used by Jesus at Last Supper" , "Go, Hillary! (anag) -- chalice used by Jesus at the Last Supper" , "object of quest" , "Something eagerly sought" , "Chalice used by Christ at the Last Supper" .)

I've seen this clue in the Newsday.

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