Totally destroying mint-green taxi in accident (13)

I believe the answer is:

exterminating

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'totally destroying' is the definition.
'exterminating' can be an answer for 'destroying' (exterminating is a kind of destroying). I am not sure about the 'totally' bit.

'mint-green taxi in accident' is the wordplay.
'in accident' indicates an anagram (I've seen this in other clues).
'mint'+'green'+'taxi'='mintgreentaxi'
'mintgreentaxi' is an anagram of 'EXTERMINATING'.

Can you help me to learn more?

I've seen this clue in The Telegraph.

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