The most common and most likely answer to this crossword clue is the 11 letter word MANUMISSION
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The straight part
We know that "Being unfettered" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case being unfettered = manumission.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 MANUMISSION mean?
MANUMISSION noun- Release from slavery or other legally sanctioned servitude; the giving of freedom; the act of manumitting.