The most common and most likely answer to this crossword clue is the 9 letter word WEARINESS
I've seen this crossword clue in The Times
W
E
A
R
I
N
E
S
S
Buddy explains!
The straight part
We know that "result of much study?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case result of much study? = weariness.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 WEARINESS mean?
WEARINESS noun- Exhaustion, fatigue or tiredness.
- A lack of interest or excitement.