The most common and most likely answer to this crossword clue is the 7 letter word MISTRAL
I've seen this crossword clue in Independent
M
I
S
T
R
A
L
More clues leading to the result MISTRAL
- Bloke lacking energy on a lake is a blow
- Kangaroo court maybe has released one: a blow
- Slight fog starts to roll away over lake — there's a wind
- Strong wind and cloud over river and a lake
- Beneath mountain peak, diverging trails wind
- Wind the French right up with marches in Strasbourg initially
- Violent, dry wind, haze, some rain and finally a lull
- Wind spool finally after film by artist
- Film star’s last drink almost producing wind
- Wind and haziness by river and a lake
Buddy explains!

The straight part
We know that "Wind" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case wind = mistral.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 MISTRAL mean?
MISTRAL noun- A strong cold north-west wind in southern France and the Mediterranean.