The most common and most likely answer to this crossword clue is the 8 letter word DENOUNCE
I've seen this crossword clue in Financial Times
D
E
N
O
U
N
C
E
More clues leading to the result DENOUNCE
- Condemn place of crime and swoop, removing leader
- Retreat's a little bit rubbish
- Condemn poor scholar holding one back
- Stigmatise thick person consuming food additive?
- Damn slow learner holds individual up
- Rubbish wild cat placed under lair
- Run down wildcat beneath lair
- Accuse a person about breaking dipstick
- Criticise Democrat’s opening part of speech in European church
- Condemn the little weight given to study
Buddy explains!

The straight part
We know that "Damn" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case damn = denounce.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 DENOUNCE mean?
DENOUNCE verb- To make known in a formal manner; to proclaim; to announce; to declare.
- To criticize or speak out against (someone or something); to point out as deserving of reprehension, etc.; to openly accuse or condemn in a threatening manner; to invoke censure upon; to stigmatize; to blame.
- To make a formal or public accusation against; to inform against; to accuse.
- To proclaim in a threatening manner; to threaten by some outward sign or expression; make a menace of.
- To announce the termination of; especially a treaty or armistice.
- To claim the right of working a mine that is abandoned or insufficiently worked.