The most common and most likely answer to this crossword clue is the 6 letter word WIGWAM
I've seen this crossword clue in The Times
W
I
G
W
A
M
More clues leading to the result WIGWAM
- Home of the brave, made of slate, and well heated? Not right!
- A shelter’s removable locks crop up
- Rug welcoming queen's left in accommodation
- Rug with a motif originally in tent-like dwelling
- Mum, with soldier’s wife, put up tent
- Wife and mother reclined on rug in tent
- Mum with whiskey welcoming soldier back home, US style
- One going over Trump’s head to get Washington money for basic housing?
- Shock that’s put on by 80s band in audition in tent
- Brave campers might be in here
Buddy explains!

The straight part
We know that "shelter" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case shelter = wigwam.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 WIGWAM mean?
WIGWAM noun- A dwelling having an arched framework overlaid with bark, hides, or mats, used by Native Americans in the northeastern United States.
- (possibly obsolete) Any more or less similar dwelling used by indigenous people in other parts of the world.
- To dry (flax or straw) by standing it outside in the shape of a wigwam.