The most common and most likely answer to this crossword clue is the 10 letter word DEPLORABLE
I've seen this crossword clue in Independent
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More clues leading to the result DEPLORABLE
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The cryptic/wordplay part
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What does DEPLORABLE mean?
DEPLORABLE noun- A person or thing that is to be deplored.
- (US politics) A Trumpist conservative, in reference to a 2016 speech by Hillary Clinton calling half of Donald Trump's supporters a "basket of deplorables".
- Deserving strong condemnation; shockingly bad, wretched.
- Lamentable, to be felt sorrow for, worthy of compassion.