Bother the worried butler about nothing (7)
I believe the answer is:
trouble
'bother' is the definition.
(synonyms)
'the worried butler about nothing' is the wordplay.
'the worried' is an anagram indicator.
'about' indicates putting letters inside.
'nothing' becomes 'o' (looks like zero - 0).
'butler' anagrammed gives 'truble'.
'truble' going around 'o' is 'TROUBLE'.
(Other definitions for trouble that I've seen before include "Difficulty, problems" , "Trial, care, worry" , "Nuisance, bother" , "Discord" , "that follow witches' toil?" .)