The most common and most likely answer to this crossword clue is the 6 letter word FRIDGE
I've seen this crossword clue in Independent
F
R
I
D
G
E
More clues leading to the result FRIDGE
- Cooler close to cliff edge
- Cooler frost initially seen on hilltop
- Force bank to provide short term storage
- Cooler fellow on saddle
- It’s cooler following narrow hilltop
- Strong ledge? Most kitchens’ll have one
- Bottom of egg fried badly in kitchen appliance
- Fine trip to secure good item for kitchen
- Cooler day starts to disappear, gradually ending
- French papers, say, turned up in place of the milk
Buddy explains!

The straight part
We know that "Cooler" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cooler = fridge.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 FRIDGE mean?
FRIDGE noun- A refrigerator.
- To place inside of a refrigerator.
- To gratuitously kill, disempower, or otherwise remove a character, usually female, from a narrative, often strictly to hurt another character, usually male, and provide him with a personal motivation for fighting the antagonist(s).
- To rub, chafe.