The most common and most likely answer to this crossword clue is the 9 letter word INDEMNITY
I've seen this crossword clue in The Daily Telegraph
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More clues leading to the result INDEMNITY
Buddy explains!
The straight part
We know that "Guarantee/compensation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case guarantee/compensation = indemnity.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 INDEMNITY mean?
INDEMNITY noun- Security from damage, loss, or penalty.
- An obligation or duty upon an individual to incur the losses of another.
- Repayment; compensation for loss or injury.
- The right of an injured party to shift the loss onto the party responsible for the loss.
- A principle of insurance which provides that when a loss occurs, the insured should be restored to the approximate financial condition occupied before the loss occurred, no better, no worse.