English comedians bored by working money matters (9)
I believe the answer is:
economics
'money matters' is the definition.
(thesaurus)
'english comedians bored by working' is the wordplay.
'english' becomes 'E' (abbreviation).
'comedians' becomes 'comics' ('comic' can be a synonym of 'comedian').
'bored by' indicates putting letters inside (to bore something can mean to drill into it).
'working' becomes 'on' (on can mean working or activated).
'comics' enclosing 'on' is 'conomics'.
'e'+'conomics'='ECONOMICS'
(Other definitions for economics that I've seen before include "Thomas Carlyle's "dismal science"" , "Treasury's concern" , "Monetary science" , "One of the social sciences" , "Monetary management" .)