Suggestion from wraith in Tolkien (4)
I believe the answer is:
'suggestion' is the definition.
(I know that suggestion can be written as hint)
'from wraith in tolkien' is the wordplay.
'from' says the answer is hidden in the clue.
'HINT' is hidden within 'wraith in tolkien'.
(Other definitions for hint that I've seen before include "Tip, clue" , "Clue - soupcon" , "suspicion" , "Small trace; clue" , "Tip - small amount" .)