The most common and most likely answer to this crossword clue is the 10 letter word FANCY-FREE
I've seen this crossword clue in Financial Times
F
A
N
C
Y
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F
R
E
E
Buddy explains!

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.
Crossword Answer definitions
FANCY-FREE adjective- Free of commitments or obligations
- Having no spouse or other partner