The most common and most likely answer to this crossword clue is the 8 letter word STICKLER
I've seen this crossword clue in The Times
S
T
I
C
K
L
E
R
More clues leading to the result STICKLER
- Precise sort of knife left cuts
- Punctilious type left in gummed label
- Label describing lecturer as pedant?
- Pedant needs to stay alert in the middle
- Student’s prime requirement – someone to amuse or disciplinarian?
- Insert line in notice for pedant
- Singular problem for punctilious person
- Special, tricky puzzle for pernickety individual
- Label outlining conclusion of anal pedant
- Demanding individual senior nurses apply light touch
Buddy explains!

The straight part
We know that "Precise sort" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case precise sort = stickler.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 STICKLER mean?
STICKLER noun- A referee or adjudicator at a fight, wrestling match, duel, etc. who ensures fair play.
- Someone who insistently advocates for something.