Intermediate position for man on board (9)
I believe the answer is:
amidships
'intermediate' is the definition.
(thesaurus)
'position for man on board' is the wordplay.
I cannot quite see how this works, but
'man' could be 'hi' and 'hi' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for amidships that I've seen before include "core on board" , "Centrally on board" , "At the centre of a boat" , "moving towards the driest place on board?" , "nautical location?" .)