The most common and most likely answer to this crossword clue is the 5 letter word BEFOG
I've seen this crossword clue in The Daily Telegraph
B
E
F
O
G
More clues leading to the result BEFOG
- Cloud enveloping English female in spongy ground
- Make confused request about Italian playmaker
- British force with calamitous error in cloud
- Obscure iron roundabout in Slough
- Obscure iron wheels buried in swamp
- Obscure band ends festival of Glastonbury initially
- Confuse live before soup
- ‘Blur’ band ends, forming other group initially
- Obscure English female hides in lavatory, rather rudely
- Confused foe wears empty bag
Buddy explains!

The straight part
We know that "Obscure" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case obscure = befog.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 BEFOG mean?
BEFOG verb- To envelop in fog or smoke.
- To confuse, mystify (a person); to make less acute or perceptive, to cloud (a person’s faculties).
- To obscure, make less clear (a subject, issue, etc.).