Eisteddfod winner, dull, turned up (4)
I believe the answer is:
bard
'eisteddfod winner' is the definition.
(bards compete in the Eisteddfod - Welsh contest)
'dull turned up' is the wordplay.
'dull' becomes 'drab' (synonyms).
'turned up' says the letters should be written in reverse.
'drab' back-to-front is 'BARD'.
(Other definitions for bard that I've seen before include "Poet - prophet" , "Epic poet" , "Shakespeare" , "Poet; sounds like forbidden" , "Eisteddfod winner" .)