Endless dispute in resort (3)
I believe the answer is:
spa
'resort' is the definition.
(spa is a kind of resort)
'endless dispute' is the wordplay.
'endless' means to remove the last letter.
'dispute' becomes 'spat' (spat is a kind of dispute).
'spat' with its last letter removed is 'SPA'.
'in' acts as a link.
(Other definitions for spa that I've seen before include "A therapeutic hot spring" , "Watering place" , "well" , "Hydromassage facility" , "here for healthy holiday" .)