Ark's resting place (6)
I believe the answer is:
ararat
'ark's resting place' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for ararat that I've seen before include "historic landing site" , "Biblical mountain" , "Mount on which Noah's Ark is said to have landed" , "Mount on which Noah's ark grounded" , "Mountain where the Ark grounded" .)