Brickie's eye needed to fill top part of course? (4,3)

I believe the answer is:

choc ice

But I can't explain it at all!

(Other definitions for choc ice that I've seen before include "cold snack" , "dessert" , "Frozen item" , "Cold, coated confection" , "Something to eat" .)

I've seen this clue in The Times.

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