Go to pieces when making dessert (7)
I believe the answer is:
crumble
'go to pieces' is the definition.
(thesaurus)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for crumble that I've seen before include "Break down, fall apart" , "Fall to bits; a pudding" , "Gradually disintegrate" , "Type of pudding - disintegrate" , "Break up - fruit dish" .)