The most common and most likely answer to this crossword clue is the 5 letter word FIERY
I've seen this crossword clue in The Daily Telegraph
F
I
E
R
Y
More clues leading to the result FIERY
- Passionate on-line exclamation of disapproval
- Passionate knight leaves showy clothing
- Hot-headed knight getting out of his glad rags
- Cook claims that is hot
- Like whiskey, if rye is used to make it
- Angry word of disapproval delivered to railway
- Showy adornments not new or hot
- Bold knight steering clear of resplendent garb
- Hot, like one expressing disapproval?
Buddy explains!

The straight part
We know that "Like whiskey," is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case like whiskey, = fiery.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 FIERY mean?
FIERY adjective- Of or relating to fire.
- Burning or glowing.
- Inflammable or easily ignited.
- Having the colour of fire.
- Hot or inflamed.
- Tempestuous or emotionally volatile.
- Spirited or filled with emotion.