The most common and most likely answer to this crossword clue is the 8 letter word ICETRAYS
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The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ICETRAYS mean?
ICETRAYS noun- A household item usually in the form of a plastic or metal device with a series of indentations such that the item may be easily filled with water (or another liquid) for the purpose of being placed in a freezer, from which it will later be removed, at which point it will contain easily separable ice cubes (or frozen cubes of whatever liquid was placed in it).