The most common and most likely answer to this crossword clue is the 8 letter word SEDATELY
S
E
D
A
T
E
L
Y
More clues leading to the result SEDATELY
- Journalist put away, passing through arch with dignity
- Deliberately furtive about online meeting?
- With composure and cunning to embrace oriental girlfriend
- Some time passed at Ely in a sober sort of way
- With composure and cunning embracing oriental girlfriend
- Calmly start to elope with boyfriend in secret
- Playing Steely Dan endlessly and calmly
- Calmly start to enfold escort in artful embrace
Buddy explains!

The straight part
We know that "Calmly" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case calmly = sedately.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.