The most common and most likely answer to this crossword clue is the 12 letter word LARGE-MINDED
I've seen this crossword clue in The Guardian
L
A
R
G
E
-
M
I
N
D
E
D
Buddy explains!
The straight part
We know that "Generous" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case generous = large-minded.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 LARGE-MINDED mean?
LARGE-MINDED adjective- Characterized by breadth of view; broad-minded.