The most common and most likely answer to this crossword clue is the 9 letter word ABOUNDING
I've seen this crossword clue in The Daily Telegraph
A
B
O
U
N
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G
Buddy explains!

The straight part
We know that "widely evident" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case widely evident = abounding.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.
Crossword Answer definitions
ABOUNDING verb- To be full to overflowing.
- To be wealthy.
- To be highly productive.
- To be present or available in large numbers; to be plentiful.
- To revel in.
- To be copiously supplied
- An abundance.
- Ample, plenty, abundant.