Atlantic zones give chargers some freedoms (5-9)

I believe the answer is:

horse-latitudes

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

'atlantic zones' is the definition.
(I've seen this before)

'chargers some freedoms' is the wordplay.
'chargers some' becomes 'horse' (I can't justify this - if you can you should give a lot more credence to this answer).
'freedoms' becomes 'latitudes' (latitude is a kind of freedom).
'horse'+'latitudes'='HORSE-LATITUDES'

'give' is the link.

Can you help me to learn more?

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

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