Little birdie and servant capture the French part of book (5,4)
I believe the answer is:
title page
'part of book' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'little birdie and servant capture the french' is the wordplay.
'little birdie' becomes 'tit' (I am not sure about this - if you are sure you should believe this answer much more).
'and' means one lot of letters go next to another.
'servant' becomes 'page' (I've seen this before).
'capture' indicates putting letters inside.
'the french' becomes 'le'.
'tit'+'page'='titpage'
'titpage' placed around 'le' is 'TITLE-PAGE'.
Can you help me to learn more?
(Other definitions for title page that I've seen before include "Start of book" , "front of book" , "One of the first leaves" , "Early leaf of a book" , "Sheet bearing name of book and author" .)