The most common and most likely answer to this crossword clue is the 6 letter word LOUNGE
I've seen this crossword clue in The Guardian
L
O
U
N
G
E
More clues leading to the result LOUNGE
- See a Parisian dress being worn by bishop in watering-hole
- Bar in spring having nothing to eat
- Move quickly to accommodate old in waiting room
- Surge forward grasping love
- Tight uniform – leg with no room to unwind
- Dive forward to catch duck in passenger area
- Kill time in boxing ring with jab
- Thrust round old gathering spot for lizards?
- Idle Donald’s second to enter dive
- Room to go forward rapidly without second in command
Buddy explains!

The straight part
We know that "Kill time" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case kill time = lounge.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 LOUNGE mean?
LOUNGE noun- A waiting room in an office, airport etc.
- A domestic living room.
- An establishment, similar to a bar, that serves alcohol and often plays background music or shows television.
- A large comfortable seat for two or three people or more, a sofa or couch; also called lounge chair.
- The act of one who lounges; idle reclining.
- To relax; to spend time lazily; to stand, sit, or recline, in an indolent manner.