The most common and most likely answer to this crossword clue is the 8 letter word CURLICUE
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More clues leading to the result CURLICUE
Buddy explains!
The straight part
We know that "Flourish" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case flourish = curlicue.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 CURLICUE mean?
CURLICUE noun- A fancy twisting or curling shape usually made from a series of concentric circles.
- To make or adorn (something) with curlicues, or as if with curlicues.