The most common and most likely answer to this crossword clue is the 5 plus 6 letter word HUMAN RIGHTS
I've seen this crossword clue in The Daily Telegraph
H
U
M
A
N
R
I
G
H
T
S
Buddy explains!
The straight part
We know that "Requirement for personal freedom" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case requirement for personal freedom = human rights.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.