Nothing turned up in extra subtitle? (6)
I believe the answer is:
byline
'subtitle?' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'nothing turned up in extra' is the wordplay.
'nothing' becomes 'nil' (eg nil is zero in football).
'turned up' is a reversal indicator.
'in' is an insertion indicator.
'extra' becomes 'bye' (bye is a type of extra in cricket).
'nil' reversed gives 'lin'.
'lin' placed inside 'bye' is 'BYLINE'.
Can you help me to learn more?
(Other definitions for byline that I've seen before include "end of play" , "Credit for one reporting" , "Credit given author" , "attribution" .)