The most common and most likely answer to this crossword clue is the 10 letter word WEIGHTLESS
I've seen this crossword clue in Financial Times
W
E
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G
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More clues leading to the result WEIGHTLESS
- Number among twelve evenly distributed on ship, floating
- A rowing team down on Windermere, initially floating
- With crew on leave empty ship is light
- Women see lights out, being this in space
- Not finding the planet attractive
- Light, with hourglass figures, including the French
- Airy woman, forty-two rather than fifty
- Women’s crew with fewer pounds? None at all
Buddy explains!

The straight part
We know that "floating" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case floating = weightless.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 WEIGHTLESS mean?
WEIGHTLESS adjective- Which has no weight.
- Which is not being affected by gravity.