A milk supplier went ahead wearing a hood (6)

I believe the answer is:

cowled

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'wearing a hood' is the definition.
The answer and definition are different parts of speech. However, past participle verbs and adjectives can sometimes define each other.

'a milk supplier went ahead' is the wordplay.
'a milk supplier' becomes 'cow' (I've seen this in another clue).
'went ahead' becomes 'led' (led the way).
'cow'+'led'='COWLED'

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

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