Dairy products sort guy out (7)
I believe the answer is:
yogurts
'dairy products' is the definition.
(yogurt is a kind of dairy product)
'sort guy out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'sort'+'guy'='sortguy'
'sortguy' is an anagram of 'YOGURTS'.
(Other definitions for yogurts that I've seen before include "Snacks" , "Dairy products" .)