Tin loaded on old English vessel (5)
I believe the answer is:
canoe
'vessel' is the definition.
(canoe is a kind of vessel)
'tin loaded on old english' is the wordplay.
'tin' becomes 'can' ('can' can be a synonym of 'tin'**).
'loaded' is a charade indicator (letters next to each other).
'on' means one lot of letters go next to another.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'english' becomes 'e' (abbreviation).
'can'+'o'+'e'='CANOE'
(Other definitions for canoe that I've seen before include "Light boat propelled with paddle" , "Boat one paddles" , "Boat that's paddled" , "Small boat with paddles" , "Ocean (anag)" .)