Prophet takes students to see dealer (6)
I believe the answer is:
seller
'dealer' is the definition.
(thesaurus)
'prophet takes students' is the wordplay.
'prophet' becomes 'seer' (I've seen this before).
'takes' means one lot of letters goes inside another.
'students' becomes 'll'.
'seer' enclosing 'll' is 'SELLER'.
'to see' acts as a link.
(Other definitions for seller that I've seen before include "Resell to vendor" , "One who disposes of" , "Trader" , "Person making sale" .)