The most common and most likely answer to this crossword clue is the 8 letter word DERRIERE
D
E
R
R
I
E
R
E
More clues leading to the result DERRIERE
- Bottom Irish number, reportedly?
- Clapped-out drier beginning to erode on the bottom
- Seat in Moulin Rouge
- Behind Democrat linked to slip before about island
- Seat rider adjusted before
- Behind sound of Irish song, London initially put out
- Bottom daughter to slip up? That is right – on drug
- Broadcast song when following London bum
- Seat representing most of Irish city previously occupied by Independent
- On reflection, did wrong pinching one monarch’s bottom
Buddy explains!

The straight part
We know that "Parisian behind" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case parisian behind = derriere.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 DERRIERE mean?
DERRIERE noun- (chiefly humorous) bottom, bum