The most common and most likely answer to this crossword clue is the 8 letter word LECTURER
I've seen this crossword clue in The Guardian
L
E
C
T
U
R
E
R
More clues leading to the result LECTURER
- Don Corleone initially in film hampered by siren?
- Reprimand right for academic
- Academic tempting one to circumvent European court
- Teacher: Hannibal surrounds ancient city
- Logodaedalus, oddly curt, always embracing instructor
- Teacher may provide ruler, etc
- Instructor is oddly curt, intercepting a sexy look
- Teacher shows first sign of resentment after reprimand
- Tutor with a penchant for haranguing?
- Instructor oddly curt, intercepting sexy look
Buddy explains!

The straight part
We know that "Instructor" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case instructor = lecturer.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 LECTURER mean?
LECTURER noun- A person who gives lectures, especially as a profession.
- A member of a university or college below the rank of assistant professor or reader.
- A member of the Church of England clergy whose main task was to deliver sermons (lectures) in the afternoons and evenings.