An attendant of Dionysus (5)
I believe the answer is:
satyr
'an attendant of dionysus' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for satyr that I've seen before include "Goatish deity" , "Lustful Greek woodland god" , "Lustful, drunken woodland god" , "Forest god - old goat" , "Woodland god, half man and half goat" .)