The most common and most likely answer to this crossword clue is the 11 letter word ABOMINATION
I've seen this crossword clue in The Daily Telegraph
A
B
O
M
I
N
A
T
I
O
N
More clues leading to the result ABOMINATION
- Evil island state supporting WMD briefly
- An old ambition crushed can be a terrible thing
- Curse hum during a big road race
- Lawless Moab — one country that’s evil
- . It’s a disgrace that a frenzied mob leads a country
- A group of people rejected independence — a state of horror
- Lawless Moab – one country being evil
- Revolutionary crowd interrupts road race, causing outrage
Buddy explains!
The straight part
We know that "that’s evil" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that’s evil = abomination.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 ABOMINATION mean?
ABOMINATION noun- An abominable act; a disgusting vice; a despicable habit.
- The feeling of extreme disgust and hatred
- A state that excites detestation or abhorrence; pollution.
- That which is abominable, shamefully vile; an object that excites disgust and hatred; very often with religious undertones.