Holiday-makers — sort Uist cultivated (8)
I believe the answer is:
tourists
'holiday-makers' is the definition.
(tourists are people on holiday)
'sort uist cultivated' is the wordplay.
'cultivated' is an anagram indicator.
'sort'+'uist'='sortuist'
'sortuist' anagrammed gives 'TOURISTS'.
(Other definitions for tourists that I've seen before include "They travel for pleasure" , "Visitors and sightseers" , "Group of visitors" , "Holiday-makers from abroad" .)