Capital cover for hunters (12)

I believe the answer is:

deerstalkers

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

'capital cover for hunters' is the definition.
I can't judge whether this defines the answer.

'for hunters' is the wordplay.
'for' becomes 'deer' (I am not sure about this - if you are sure you should believe this answer much more).
'hunters' becomes 'stalkers' (stalker is a kind of hunter).
'deer'+'stalkers'='DEERSTALKERS'

Can you help me to learn more?

(Another definition for deerstalkers that I've seen is " hats".)

I've seen this clue in The Globe and Mail.

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