Child about to tip up cheese (7)
I believe the answer is:
stilton
'up cheese' is the definition.
'stilton' can be an answer for 'cheese' (I've seen this before). I am not certain of the 'up' bit.
'child about to tip' is the wordplay.
'child' becomes 'son' (male child).
'about' means one lot of letters goes inside another.
'to tip' becomes 'tilt' ('tilt' can be a synonym of 'tip').
'son' enclosing 'tilt' is 'STILTON'.
Can you help me to learn more?
(Other definitions for stilton that I've seen before include "Cheese named after Cambridgeshire town" , "Dairy product" , "Lost tin (anag)" , "Blue 8 across" , "English cheese, usually veined" .)