The most common and most likely answer to this crossword clue is the 5 letter word COUCH
I've seen this crossword clue in Financial Times
C
O
U
C
H
Buddy explains!

The straight part
We know that "Where one might seduce" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case where one might seduce = couch.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 COUCH mean?
COUCH noun- Couch grass, a species of persistent grass, Elymus repens, usually considered a weed.