Point out a winemaker (5)
'a winemaker' is the definition.
(type of grape used to make wine)
'point out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'point' is an anagram of 'PINOT'.
(Other definitions for pinot that I've seen before include "Wine-making grape", "Variety of wine grape", "Variety of grape used for Burgundies and champagnes", "wine supplier?", "Black or white grape variety".)