The most common and most likely answer to this crossword clue is the 12 letter word EMANCIPATION
I've seen this crossword clue in The Guardian
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More clues leading to the result EMANCIPATION
Buddy explains!
The straight part
We know that "Given this freedom" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case given this freedom = emancipation.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 EMANCIPATION mean?
EMANCIPATION noun- The act of setting free from the power of another, as from slavery, subjection, dependence, or controlling influence.
- The state of being thus set free; liberation (used, for example, of slaves from bondage, of a person from prejudices, of the mind from superstition, of a nation from tyranny or subjugation).