The most common and most likely answer to this crossword clue is the 5 plus 2 plus 8 letter word POWER OF ATTORNEY
I've seen this crossword clue in Independent
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More clues leading to the result POWER OF ATTORNEY
- Might a Tory often upset official delegation?
- Wrote of poetry and briefly about legal document
- Authorising document is lawyer’s strength
- Prisoner, rich and spoilt, shackled by eye or dubious legal authority
- Wrong waterproof on, yet right legally
- Lawyer’s influence is used to appoint a representative
- We got involved in arranging notary for poet as a proxy legal authority
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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.