The most common and most likely answer to this crossword clue is the 6 letter word CLOUDY
I've seen this crossword clue in The Times
C
L
O
U
D
Y
More clues leading to the result CLOUDY
- Conservative forte at end of day unclear
- . Obscure? Easily picked up within borders of country
- Dull city centre’s gone flashy inside
- Obscure brash Yankee about to take the lead
- Obscure flash in college yard
- Weather forecast could change by the end of the day
- Grey hollow chimney muffles roaring
- Gloomy century followed by vibrant year
Buddy explains!

The straight part
We know that "unclear" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case unclear = cloudy.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 CLOUDY mean?
CLOUDY adjective- Covered with or characterised by clouds; overcast.
- Not transparent or clear.
- Uncertain; unclear.
- Using or relating to cloud computing.
- Shady; sketchy; suspicious