Crossword Genius

Became extremely upset after with comic (5,1,3)

Ross

I believe the answer is:

threw a fit

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'became extremely upset' is the definition.
I can't tell whether this definition defines the answer.

'after with comic' is the wordplay.
'comic' is an anagram indicator.
'after'+'with'='afterwith'
'afterwith' is an anagram of 'THREW A FIT'.

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(Another definition for threw a fit that I've seen is " Got angry".)

I've seen this clue in The Telegraph.
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