The most common and most likely answer to this crossword clue is the 3 plus 6 letter word FEE SIMPLE
I've seen this crossword clue in The Guardian
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More clues leading to the result FEE SIMPLE
Buddy explains!
The straight part
We know that "absolute property ownership" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case absolute property ownership = fee simple.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 FEE SIMPLE mean?
FEE SIMPLE noun- The private ownership of property (real estate) in which the owner has the right to control, use, and transfer the property at will.