Hard work, getting a new jingle (6)
I believe the answer is:
slogan
'jingle' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'hard work getting a new' is the wordplay.
'hard work' becomes 'slog' (a slog is a long or difficult task).
'getting' says to put letters next to each other.
'new' becomes 'n' (abbreviation as in New Testament NT).
'slog'+'a'+'n'='SLOGAN'
Can you help me to learn more?
(Other definitions for slogan that I've seen before include "Rallying cry" , "advertising catch phrase" , "short political statement" , "Identifying catchword" , "Shibboleth" .)