Energy suppliers secure Woodend traffic hub with weaponry (4,5)

I believe the answer is:

wind farms

I'm a little stuck... Click here to teach me more about this clue!

'energy suppliers' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'secure woodend traffic hub with weaponry' is the wordplay.
I cannot really see how this works, but
'secure' could be 'win' (I've seen this in another clue) and 'win' is present in the answer.
'weaponry' could be 'arms' (synonyms) and 'arms' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

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

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