Dreadful ordeal in a border city (6)
I believe the answer is:
laredo
'city' is the definition.
(I know that Laredo is a city)
'dreadful ordeal in a border' is the wordplay.
'ordeal' anagrams to 'LAREDO'.
But, I am not sure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for laredo that I've seen before include "Texan city" , "US-Mexico border town" , "US city" .)