Boat travelling holy fiord (9)
I believe the answer is:
hydrofoil
'boat' is the definition.
(hydrofoil is a kind of boat)
'travelling holy fiord' is the wordplay.
'travelling' is an anagram indicator.
'holy'+'fiord'='holyfiord'
'holyfiord' is an anagram of 'HYDROFOIL'.
(Other definitions for hydrofoil that I've seen before include "aquatic transport" , "Vessel that rides up on fixed vane or vanes" , "Device to raise fast boat out of the water" , "Boat with lifting vanes" , "Device that lifts a boat out of the water at speed" .)