The most common and most likely answer to this crossword clue is the 5 letter word TEPEE
I've seen this crossword clue in The Guardian
T
E
P
E
E
More clues leading to the result TEPEE
- Tent peg found outside gym
- Finally put sword in mobile cover
- Exercise when wearing casual shirt in tent
- Home supporter on course for keeping record
- Supporter finds gym in rudimentary building
- First place on course containing exercise in shelter
- Sophisticate peers inside tent
- Tent torn initially by sword
- Vacant, the number one place to sleep on reservation
- Tribe’s leader appearing with sword in tent
Buddy explains!

The straight part
We know that "place to sleep on reservation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case place to sleep on reservation = tepee.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 TEPEE mean?
TEPEE noun- Alternative form of teepee