The most common and most likely answer to this crossword clue is the 8 letter word ASSENTED
I've seen this crossword clue in The Times
A
S
S
E
N
T
E
D
More clues leading to the result ASSENTED
- Agreed East End's in need of renovation
- Agreed article with bouquet to be picked up
- . Idiot went in without hesitation? That’s agreed
- Short and sweet, not worth changing, so approved
- Posted cutting when editor agreed
- Given agreement when dispatched by editor
- Agreed sea tends to be rough
- Conceded, like Senator Kennedy
- Agreed, like Senator Kennedy
- Said “Yes!” when journalist dispatched lines
Buddy explains!

The straight part
We know that "Agreed" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case agreed = assented.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 ASSENTED mean?
ASSENTED verb- To agree; to give approval.
- To admit a thing as true.