The most common and most likely answer to this crossword clue is the 10 letter word ENTOMOLOGY
E
N
T
O
M
O
L
O
G
Y
Buddy explains!
The straight part
We know that "study of insects" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case study of insects = entomology.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 ENTOMOLOGY mean?
ENTOMOLOGY noun- The scientific study of insects, and (informally) of other arthropods (and occasionally other invertebrates).