Modern resort salesman turns up daily (9)
I believe the answer is:
newspaper
'daily' is the definition.
(thesaurus)
'modern resort salesman turns up' is the wordplay.
'modern' becomes 'new' ('new' is associated in meaning with 'modern').
'resort' becomes 'spa' (spa is a kind of resort).
'salesman' becomes 'rep' (I've seen this before).
'turns up' shows that the letters should be reversed in order.
'rep' written backwards gives 'per'.
'new'+'spa'+'per'='NEWSPAPER'
(Other definitions for newspaper that I've seen before include "Daily or weekly publication, keeps us abreast" , "Journal" , "Broadsheet, e.g." , "printed edition" , "Publication on folded sheets" .)