Simple boats (5)
'simple boats' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for canoes that I've seen before include "Simple boats" , "Small light boats" , "Craft" , "Small boats found in strange oceans" .)
(Other definitions for rafts that I've seen before include "Flat floating structures" , "Flat, floating platforms" , "Flat boats" , "Flat floats" .)