Banal, affected pedantries (10)
I believe the answer is:
pedestrian
'banal' is the definition.
(thesaurus)
'affected pedantries' is the wordplay.
'affected' is an anagram indicator.
'pedantries' anagrammed gives 'PEDESTRIAN'.
(Other definitions for pedestrian that I've seen before include "nothing much to write home about" , "lacking inspiration" , "How commonplace" , "Run-of-the mill" , "Dull, uninspired" .)