The most common and most likely answer to this crossword clue is the 4 letter word NARC
N
A
R
C
More clues leading to the result NARC
- Drugs agent buried in frozen Arctic
- Agent dealing with Charlie has backed Derrick mostly
- This agent working for the DEA is a grass, reportedly
- Drug agent from US contributing to anarchy
- Fed 80% of heavy machinery from the wrong side
- Agent after drug dealers seeking end of production line
- Before discharge, name US drugs officer
- Agent may have hurried up when getting cold
- One pursuing drug dealers sprinted around club
- Agent dealing with Charlie? Derrick comes up short
Buddy explains!

The straight part
We know that "Agent after drug dealers seeking end of production line" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case agent after drug dealers seeking end of production line = narc.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 NARC mean?
NARC noun- A narcotics squad police officer.
- A police spy or informer.
- An unpleasant person, especially one who makes things difficult for others.
- To watch; to observe.
- To serve or behave as a spy or informer.
- To annoy or irritate.
- To complain.
- (often imperative) To stop.
- (underwater diving) To suffer from impaired judgment due to nitrogen narcosis (for example, while scuba diving).
- A narcissist.