Had son seethed angrily, it might have led to rash impulsiveness (13)

I believe the answer is:

hotheadedness

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'it might have led to rash impulsiveness' is the definition.
The definition suggests a singular noun which matches the answer.

'had son seethed angrily' is the wordplay.
'angrily' indicates an anagram (I've seen this in other clues).
'had'+'son'+'seethed'='hadsonseethed'
'hadsonseethed' anagrammed gives 'HOTHEADEDNESS'.

Can you help me to learn more?

(Other definitions for hotheadedness that I've seen before include "(In a person) volatility" , "These dashed on (anag) - impetuosity" .)

I've seen this clue in The Irish Times.

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