Widespread, prevalent (6)
I believe the answer is:
common
I believe this clue is a double definition.
'widespread' is the first definition.
(I've seen this before)
'prevalent' is the second definition.
(thesaurus)
(Other definitions for common that I've seen before include "Occurring frequently, or ill-bred" , "Without special distinction, ordinary" , "Ordinary; open land" , "Unenclosed land - frequently seen" , "Ill-bred, not refined in manner" .)