'Time' following American phraseology (5)
I believe the answer is:
usage
'phraseology' is the definition.
(thesaurus)
'time following american' is the wordplay.
'time' becomes 'age' (age is a kind of time).
'following' says to put letters next to each other.
'american' becomes 'us'.
'age' put after 'us' is 'USAGE'.
(Other definitions for usage that I've seen before include "Treatment, practice" , "Habit" , "Convention" , "Custom; practice" , "management" .)