Kind of oil (6)
'kind of oil' is the definition.
(I know that canola is a type of vegetable oil)
This is the entire clue.
'kind of oil' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for linseed that I've seen before include "Oil produced from flax" , "Source of plant oil" , "Oil applied to cricket bats" , "Treatment for bats" , "Flax product, a source of oil" .)