The most common and most likely answer to this crossword clue is the 8 letter word OVERCOAT
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More clues leading to the result OVERCOAT
- Put too much paint on protective clothing?
- On top, firm, coming to a violent end – that should keep you warm
- Recovered from bad taco in Ulster?
- Surplus cake in Ulster?
- Clothing company advertisement, first in public
- Patent protecting firm — origin of Apple Mac?
- Hide under excessive clothing
- Top dressing?
- Finished article in bed: ‘What Not to Wear!’
- Closed small company at Inverness, for example
Buddy explains!

The straight part
We know that "that should keep you warm" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that should keep you warm = overcoat.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 OVERCOAT mean?
OVERCOAT noun- A heavy garment worn over other clothes, for protection from cold or weather.
- To apply an exterior coating to.