The most common and most likely answer to this crossword clue is the 5 letter word EXCEL
E
X
C
E
L
More clues leading to the result EXCEL
- Do well reading out two letters
- Cap size for a well-rounded individual, we hear
- Former leaders in Chelsea evidently like to do well
- Central characters in Huxley said to stand out?
- Outdo former church leader in local
- Times correspondent, initially taken in by evasive type, to do very well
- Old lover with trick said to do well
- Go beyond former prison room briefly
- Best forty Latin sounds
- Office product is to stand out
Buddy explains!

The straight part
We know that "Best" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case best = excel.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 EXCEL mean?
EXCEL verb- To surpass someone or something; to be better or do better than someone or something.
- To be much better than others.
- To exceed, to go beyond