The most common and most likely answer to this crossword clue is the 10 letter word AMELIORATE
I've seen this crossword clue in The Daily Telegraph
A
M
E
L
I
O
R
A
T
E
More clues leading to the result AMELIORATE
- A pal around Oriel, struggling to improve
- Improve American energy with reversed oil price
- Moved a mile to make address better
- Improve when playing Thora, homeless, in French film
- French film featuring old artist – tons better!
- Make better material with one’s outside broadcast
- Make better meal, or I eat junk!
- Better to cover up old cad in filmed romance
- Improve meal or I eat out
- Meal sorted out before I speak? That’s better
Buddy explains!
The straight part
We know that "For better" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case for better = ameliorate.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 AMELIORATE mean?
AMELIORATE verb- To make better, or improve, something perceived to be in a negative condition.
- To become better; improve.