Arrange tour with gem connoisseur (7)
I believe the answer is:
gourmet
'connoisseur' is the definition.
(thesaurus)
'arrange tour with gem' is the wordplay.
'arrange' is an anagram indicator.
'with' is a charade indicator (letters next to each other).
'tour' after 'gem' is 'gemtour'.
'gemtour' anagrammed gives 'GOURMET'.
(Other definitions for gourmet that I've seen before include "Appreciator of food" , "Connoisseur of fine food" , "One has expert knowledge of food and wine" , "connoisser of good food" , "Connoisseur of good food and drink" .)