Secretary, individual missing on ID (6)
I believe the answer is:
papers
'id' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'secretary individual missing on' is the wordplay.
'secretary' becomes 'pa' (abbreviation for personal assistant).
'individual' becomes 'person' (an individual person).
'missing' is a deletion indicator.
'person' with 'on' removed is 'pers'.
'pa'+'pers'='PAPERS'
Can you help me to learn more?
(Other definitions for papers that I've seen before include "Print media" , "Documents; the press" , "Identifying documents" , "ID etc." , "Documentation" .)