The most common and most likely answer to this crossword clue is the 10 letter word AUTHORISED
I've seen this crossword clue in The Daily Telegraph
A
U
T
H
O
R
I
S
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D
Buddy explains!

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 AUTHORISED mean?
AUTHORISED verb- To grant (someone) the permission or power necessary to do (something).
- To permit (something), to sanction or consent to (something).
- Explicitly allowed.