Boat trade (5)
I believe the answer is:
craft
This clue is a double definition.
'boat' is the first definition.
(thesaurus)
'trade' is the second definition.
('craft' can be a synonym of 'trade')
(Other definitions for craft that I've seen before include "Possibly a tramp or drifter's" , "Vessel; skill" , "Create" , "Skilled occupation or small boat" , "Skill; ship" .)