The most common and most likely answer to this crossword clue is the 9 letter word SCIENTIST
I've seen this crossword clue in The Daily Telegraph
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More clues leading to the result SCIENTIST
- Boffin incites trouble in street
- Researcher, say, one going into trail of evidence, is right at last
- Insect: it’s problematic for one in the laboratory
- Hawking, perhaps, is nicest organised before ornithologist’s back
- Student of biology, for example, arranged insects with it
- Dissecting insects — it could be one’s job
- Bad scent — is it Kelvin, perhaps?
- Boffin in tests spread across Channel Islands
- Dismembering insects, it could be his speciality
- Insect — it’s dissected by one?
Buddy explains!

The straight part
We know that "Researcher, say" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case researcher, say = scientist.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 SCIENTIST mean?
SCIENTIST noun- One whose activities make use of the scientific method to answer questions regarding the measurable universe. A scientist may be involved in original research, or make use of the results of the research of others.