As yet, works in winemaking (5)
I believe the answer is:
yeast
'in winemaking' is the definition.
I can't judge whether this definition defines the answer.
'as yet works' is the wordplay.
'works' indicates anagramming the letters (work can mean to twist or convulse).
'as'+'yet'='asyet'
'asyet' is an anagram of 'YEAST'.
Can you help me to learn more?
(Other definitions for yeast that I've seen before include "Fungi used in bakery" , "Fungus used to ferment sugar" , "lifting agent" , "Androgynous" , "Alcohol-producing fungus" .)