I have no idea what could ultimately make son upset (4,3,2)
I believe the answer is:
dont ask me
'i have no idea' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'what could ultimately make son upset' is the wordplay.
'ultimately' indicates one should take the final letters.
'upset' indicates an anagram.
The final letters of 'what could' are 'td'.
'tdmakeson' anagrammed gives 'DONT ASK ME'.
Can you help me to learn more?