Insult wounds veteran partner in wanton style (10)

I believe the answer is:

prodigally

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'insult wounds veteran partner in wanton style' is the definition.
I can't tell whether this definition defines the answer.

'insult wounds veteran partner in' is the wordplay.
'insult wounds' becomes 'dig' (I can't justify this - if you can you should give a lot more credence to this answer).
'veteran' becomes 'pro' (I've seen this in another clue).
'partner' becomes 'ally' (an ally is an associate or supporter).
'in' is an insertion indicator.
'pro'+'ally'='proally'
'dig' placed into 'proally' is 'PRODIGALLY'.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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