Pure ices for them of course (8)

I believe the answer is:

epicures

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'them of course' is the definition.
I can't judge whether this definition defines the answer.

'pure ices' is the wordplay.
'pure ices' anagrams to 'EPICURES'.
But, I'm unsure how this is indicated.

'for' is the link.

Can you help me to learn more?

(Other definitions for epicures that I've seen before include "those with refined tastes" , "They know about eating" .)

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

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