Common boy after information (7)
I believe the answer is:
generic
'common' is the definition.
(generic can mean common or ordinary)
'boy after information' is the wordplay.
'boy' becomes 'eric' (I've seen this before).
'after' says to put letters next to each other.
'information' becomes 'gen' (gen can informally mean information).
'eric' after 'gen' is 'GENERIC'.
(Other definitions for generic that I've seen before include "Unspecific" , "Of a whole genus or group" , "of a particular type" , "(Of drugs) having no brand name" , "Common" .)