Covers a cake (4)
I believe the answer is:
ices
'covers a cake' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ices that I've seen before include "Decorates cakes with frosting" , "they may be held in the summer" , "Cold confections" , "summer refreshment" , "Cold refreshments" .)