A manuscript written on old sets of questions (5)
I believe the answer is:
exams
'sets of questions' is the definition.
The answer and definition can be both related to communication as well as being plural nouns.
Maybe you can see a link between them that I can't see?
'a manuscript written on old' is the wordplay.
'manuscript' becomes 'ms' (abbreviation for manuscript).
'written on' is a charade indicator (letters next to each other).
'old' becomes 'ex' (prefix meaning former or onetime).
'a'+'ms'='ams'
'ams' after 'ex' is 'EXAMS'.
Can you help me to learn more?
(Other definitions for exams that I've seen before include "summer term commitment?" , "finals?" , "Student assessments" , "GCSE, A-level, etc" , "Important tests" .)