The most common and most likely answer to this crossword clue is the 7 letter word PACIFIC
P
A
C
I
F
I
C
More clues leading to the result PACIFIC
- Calm current provided in photo
- Serene, though surrounded by endless pack ice
- Power and current provided reduction in frozen ocean
- Peaceful account: Kipling poem framed by picture
- Peaceful surroundings of Tahiti?
- Nearly all choose to accept current condition for peace
- Trump’s around providing a little bit of ‘culture’? I kept trying to calm down
- Drink annually provided by one in cricket club
- Conflict-free ocean
- Airman with uncertainty in film, not aggressive
Buddy explains!

The straight part
We know that "Calm" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case calm = pacific.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 PACIFIC mean?
PACIFIC adjective- Calm, peaceful.
- Preferring peace by nature; avoiding violence.