The most common and most likely answer to this crossword clue is the 4 plus 6 letter word OPEN HANDED
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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 = open handed.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 OPEN HANDED mean?
OPEN HANDED verb- To perform an action using an open hand.
- Done with the hand open rather than clenched
- Liberal and generous.
- Frank, honest, and tolerant.
- Characterized by looseness and fullness.
- With an open hand or hands.
- Generously.