Sail ark no more at sea (9)
I believe the answer is:
moonraker
'sail' is the definition.
(I've seen this before)
'ark no more at sea' is the wordplay.
'at sea' indicates anagramming the letters.
'ark'+'no'+'more'='arknomore'
'arknomore' with letters rearranged gives 'MOONRAKER'.
(Other definitions for moonraker that I've seen before include "James Bond film" , "Small square sail" , "Wiltshireman" , "James bond novel" , "Book" .)