The most common and most likely answer to this crossword clue is the 8 letter word QUISLING
Q
U
I
S
L
I
N
G
More clues leading to the result QUISLING
- E.g. Pétain, Parisian who needs weapon
- Traitor in Paris who attracts support
- Abruptly abandon shy Norway rat
- Traitor in Paris who has basic weapon
- Question one, then hang traitor
- Grass pitch with seventy-five pence lying on it?
- Traitor in Paris who has support
- Turncoat who, across the Channel, gets support
- In France, who’s to hang Judas?
- Question posed by one working hard, not a very collaborative type
Buddy explains!

The straight part
We know that "Turncoat" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case turncoat = quisling.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 QUISLING mean?
QUISLING noun- A traitor who collaborates with the enemy.