The most common and most likely answer to this crossword clue is the 9 letter word SANGFROID
S
A
N
G
F
R
O
I
D
More clues leading to the result SANGFROID
- Exotic frog I found in dunes? No great excitement here
- Did arias, maybe, getting rid of alternative being composed in conservatoire?
- Doctor faring so with director shows composure
- Cool girl fans do badly with no end of potential
- Composure required, but drags on if suffering
- Belted out lyrics, rid of composed calmness
- Cool gains for excited Democrat
Buddy explains!

The straight part
We know that "Cool" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cool = sangfroid.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 SANGFROID mean?
SANGFROID noun- Composure, self-possession or imperturbability especially when in a dangerous situation.