Grimm creature (5)
I believe the answer is:
gnome
'grimm creature' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gnome that I've seen before include "Creature in garden (or Zurich?)" , "Swiss banker" , "Goblin" , "Small fellow" , "Dwarfish creature; garden ornament" .)