Tutor is sorting out sightseer (7)
I believe the answer is:
tourist
'sightseer' is the definition.
(thesaurus)
'tutor is sorting out' is the wordplay.
'sorting out' indicates an anagram.
'tutor'+'is'='tutoris'
'tutoris' with letters rearranged gives 'TOURIST'.
(Other definitions for tourist that I've seen before include "Visiting sightseer" , "Holiday traveller" , "One travels for pleasure" , "Tripper, sightseer" , "Sightseeing traveller" .)