Page turned down party clothes (3-3)
I believe the answer is:
dog-ear
'page turned down' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'party clothes' is the wordplay.
'party' becomes 'do' (do is a kind of party).
'clothes' becomes 'gear' (I've seen this before).
'do'+'gear'='DOG-EAR'
Can you help me to learn more?
(Other definitions for dog-ear that I've seen before include "Crease in book page like canine appendage" , "Corner of a page turned down to mark your place" , "Fold on page's corner" , "Hint of shabbiness" , "Fold down a corner (of a page)" .)