The most common and most likely answer to this crossword clue is the 9 letter word RECONQUER
I've seen this crossword clue in The Times
R
E
C
O
N
Q
U
E
R
More clues leading to the result RECONQUER
Buddy explains!
The straight part
We know that "Best, once again" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case best, once again = reconquer.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 RECONQUER mean?
RECONQUER verb- To conquer again.