The most common and most likely answer to this crossword clue is the 7 plus 3 letter word CHAMBER POT
I've seen this crossword clue in The Guardian
C
H
A
M
B
E
R
P
O
T
More clues leading to the result CHAMBER POT
- Waste 11 with slight convexity around top of handle and upturned lid
- Two taps on orange sink, something to go on
- Yellow River dividing Switzerland from Thailand is receptacle for waste
- Legislative body funds facility for night-time relief
- Broach temp about something for night time reception?
- Extremely coquettish kind of yellow jumper turned up where one goes at night
Buddy explains!
The straight part
We know that "where one goes at night" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case where one goes at night = chamber pot.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.