The most common and most likely answer to this crossword clue is the 10 letter word VICTORIOUS
I've seen this crossword clue in Financial Times
V
I
C
T
O
R
I
O
U
S
More clues leading to the result VICTORIOUS
- Champion can be harsh without turning corrupt
- Winning virtuoso is confused about one note
- Beating evil controls rising corruption
- Triumphant as Sid embracing the symbol of Glastonbury?
- Conquering savage to capture hill
- Simon oddly ignored by fellow American when winning
- Winning man promises to pay
- Conquering rocky hill in dangerous surroundings
- Cruel being over the hill for champion
Buddy explains!

The straight part
We know that "Beating" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case beating = victorious.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 VICTORIOUS mean?
VICTORIOUS adjective- Being the winner in a contest, struggle, war, etc.
- Of or expressing a sense of victory or triumph.