A vessel to draw (3)
I believe the answer is:
tug
This clue is a double definition.
'a vessel' is the first definition.
(tug is a kind of vessel)
'draw' is the second definition.
(tugging is a kind of drawing)
'to' acts as a link.
(Other definitions for tug that I've seen before include "Tow boat" , "Pull vigorously, yank" , "A sharp pull or a towing boat" , "Powerful boat" , "Haul" .)