National park in Utah (6)
I believe the answer is:
arches
'national park in utah' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for arches that I've seen before include "Found on feet and bridges" , "(Cat) stretches (back)" , "Parts of bridge structure" , "Features of bridges or feet" , "Curves over openings" .)