The most common and most likely answer to this crossword clue is the 6 letter word WARMTH
I've seen this crossword clue in Financial Times
W
A
R
M
T
H
More clues leading to the result WARMTH
- Some swarm that appears for summery weather
- Cordiality on leaving some time after conflict
- With weapon? Not I packing heat
- Cordiality month after conflict no longer on
- Heat of battle over short period of time
- Conflict on the borders of Muscat helps initially generating heat
- Compassion some weeks after conflict
- What’s wrong about part of our navy showing friendliness
- Fighting insect with no love for geniality
- Result if heated conflict goes over month
Buddy explains!

The straight part
We know that "Cordiality" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cordiality = warmth.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 WARMTH mean?
WARMTH noun- A moderate degree of heat; the sensation of being warm.
- Friendliness, kindness or affection.
- Fervor, intensity of emotion or expression.
- The effect of using mostly red and yellow hues.