A type of banana (8)
I believe the answer is:
plantain
'a type of banana' is the definition.
(I know that plantain is a type of banana)
This is the entire clue.
(Other definitions for plantain that I've seen before include "Shrub; green banana" , "Sort of banana" , "Cooking banana" , "Pal at inn (anag)" , "Coarse banana" .)