The most common and most likely answer to this crossword clue is the 11 letter word ENLIGHTENED
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More clues leading to the result ENLIGHTENED
Buddy explains!

The straight part
We know that "Liberal" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case liberal = enlightened.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 ENLIGHTENED mean?
ENLIGHTENED verb- To supply with light.
- To make something clear to (someone); to give knowledge or understanding to.
- Someone who has been introduced to the mysteries of some activity, religion especially Buddhism
- Educated or informed
- Made aware of something
- Freed from illusion
- Exceedingly wise