The most common and most likely answer to this crossword clue is the 6 letter word RANCID
R
A
N
C
I
D
More clues leading to the result RANCID
- Was head of detectives turned?
- Bad storm skirting North Carolina
- Chased by police, sped off
- Worked as senior policeman in rank
- Managed to get record, holding second of rivals off
- Worked with detectives to get rank
- Clubs invested in currency that's rising high
- What top plainclothes copper did is rotten
- Bad officer cut down in midst of attack
- Being ahead of coppers, dashed off
Buddy explains!

The straight part
We know that "bad" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bad = rancid.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 RANCID mean?
RANCID adjective- Rank in taste or smell.
- Offensive.