The most common and most likely answer to this crossword clue is the 9 letter word AUTHORISE
I've seen this crossword clue in The Guardian
A
U
T
H
O
R
I
S
E
More clues leading to the result AUTHORISE
- Art house I gathered, OK
- Approve increase after Henry's invested in US car
- Approve art house I rebuilt
- God’s first person in Australia gets English permit
- Writer is English, that’s clear
- Hires out a buggy getting permit
- Hires out a dodgy permit
- Writer’s note, OK
- Clear writer with one’s signature at the end
- One involved in defacing a treacherous leader — he's our mandate
Buddy explains!
The straight part
We know that "Approve" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case approve = authorise.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 AUTHORISE mean?
AUTHORISE verb- To grant (someone) the permission or power necessary to do (something).
- To permit (something), to sanction or consent to (something).