Slender Japanese mushroom (5)
I believe the answer is:
enoki
'slender japanese mushroom' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for enoki that I've seen before include "Japanese food" , "Japanese mushroom type" , "Fare from the Far East" , "Oriental mushroom; E ikon (anag.)" .)