The most common and most likely answer to this crossword clue is the 3 plus 1 plus 6 plus 5 letter word NOT A PRETTY SIGHT
I've seen this crossword clue in The Times
N
O
T
A
P
R
E
T
T
Y
S
I
G
H
T
More clues leading to the result NOT A PRETTY SIGHT
- After polite refusal, rather a lot becoming ugly
- Apt representation of potty shattering?
- Treat to spy? Thing quite different!
- & 24dn. Organising the trip got nasty, not a pleasant situation
- Rotten pigsty that endlessly stinks – unpleasant spectacle
- d Seeing it sickens, I politely decline rather large number
Buddy explains!
The straight part
We know that "ugly" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ugly = not a pretty sight.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.