It's unsuitable for ocean travel (5)
I believe the answer is:
canoe
'travel' is the definition.
The answer and definition can be both to do with motion as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'it's unsuitable for ocean' is the wordplay.
'ocean' anagrams to 'CANOE'.
But, I'm not sure how this is indicated.
Can you help me to learn more?
(Other definitions for canoe that I've seen before include "Small and light boat, pointed at both ends" , "Simple boat" , "Light, narrow open boat" , "Boat that's paddled" , "River craft" .)