This type of dairy product is left uncovered? (3)
I believe the answer is:
ilk
'this type' is the definition.
(ilk can mean a type or kind)
'of dairy product is left uncovered?' is the wordplay.
'of dairy' becomes 'il' (I can't justify this - if you can you should believe this answer much more).
'product' becomes 'booklet' (booklet is a kind of product).
'is left uncovered?' says to take the centre (letters that cover the word up are removed).
The middle of 'booklet' is 'k'.
'il'+'k'='ILK'
Can you help me to learn more?
(Other definitions for ilk that I've seen before include "Type of milksop" , "A certain type of person" , "Kind, class" , "Kind of silks" , "Sort or type of silks" .)