Publicity gets nothing -- bother! (3)
I believe the answer is:
ado
'bother' is the definition.
(ado can mean a commotion or fuss)
'publicity gets nothing' is the wordplay.
'publicity' becomes 'ad' (short for advert).
'gets' is a charade indicator (letters next to each other).
'nothing' becomes 'o' (looks like zero - 0).
'ad'+'o'='ADO'
(Other definitions for ado that I've seen before include "Flap" , "excitement" , "Fuss, trouble" , "Busy activity, trouble" , "Fuss, bother" .)