Reservation often securing such accommodation (5)
I believe the answer is:
tepee
'accommodation' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for tepee that I've seen before include "Wherein Sioux" , "Native American tent" , "Traditional tent of N American aborigine" , "temporary shelter" , "North American Indian tent" .)