50% of ACME parts cartoon hunter cut were about to explode? (5)

'about to explode?' is the definition.
I can't judge whether this definition defines the answer.

'50% of acme parts cartoon hunter cut' is the wordplay.
'50% of' means to take half the letters.
'parts' means one lot of letters goes inside another (inserted letters separate or part others).
'cartoon hunter' becomes 'fudd' (I've seen this in another clue).
'cut' means to remove the last letter.
'acme' cut in half is 'me'.
'fudd' with its final letter taken off is 'fud'.
'me' placed into 'fud' is 'FUMED'.

'were' is the link.

Can you help me to learn more?