The most common and most likely answer to this crossword clue is the 3 plus 4 letter word SEA FRET
S
E
A
F
R
E
T
More clues leading to the result SEA FRET
- Threat to visibility from different directions a worry
- Haar coming from south-east a worry
- Radio announcement's to recognise a worry: coastal fog
- See raft badly in mist
- Trouble at reefs?
- Mist may be a worry on the borders of Shropshire
- Problem for sailors? Perceive distress, from what’s reported
- Unusual fear among group in phenomenon coming inland?
- Fog coming from south-east a worry
Buddy explains!

The straight part
We know that "Haar" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case haar = sea fret.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.