The most common and most likely answer to this crossword clue is the 8 letter word INUNDATE
I
N
U
N
D
A
T
E
More clues leading to the result INUNDATE
- Flood one sister encountered on tryst
- One sister takes boyfriend to swamp
- Overwhelm religious woman after one appointment
- I see entertaining creature of habit in swamp
- I go out with woman with a habit in Bury
- At home, maybe take time away from flood
- Overwhelm in a Parisian court
- Overwhelm at home a French girlfriend
- Overwhelm one lady with habit to see men?
- Sister on time after second part of film’s overrun
Buddy explains!

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 INUNDATE mean?
INUNDATE verb- To cover with large amounts of water; to flood.
- To overwhelm.