The most common and most likely answer to this crossword clue is the 10 letter word SMOLDERING
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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 SMOLDERING mean?
SMOLDERING verb- To burn with no flame and little smoke.
- To show signs of repressed anger or suppressed mental turmoil or other strong emotion, such as passion.
- To exist in a suppressed or hidden state.
- (sometimes figurative) The act by which something smoulders; residual heat.