Endless delay - equipment twice running short in Hawaiian location (7)
I believe the answer is:
waikiki
'twice running short in hawaiian location' is the definition.
The definition suggests a singular noun which matches the answer.
'endless delay equipment' is the wordplay.
'endless' means to remove the last letter.
'delay' becomes 'wait' (synonyms).
'equipment' becomes 'kiki' (I can't explain this - if you can you should believe this answer much more).
'wait' with its final letter taken away is 'wai'.
'wai'+'kiki'='WAIKIKI'
Can you help me to learn more?
(Other definitions for waikiki that I've seen before include "Renowned Hawaiian beach" , "Famous Honolulu beach" , "Famous Hawaiian beach" , "Honolulu beach resort" .)