Madden Dicky or Bill (6)
I believe the answer is:
demand
'bill' is the definition.
(thesaurus)
'madden dicky' is the wordplay.
'dicky' indicates anagramming the letters (dicky can mean ill or non-functioning).
'madden' is an anagram of 'DEMAND'.
'or' acts as a link.
(Other definitions for demand that I've seen before include "Requirement" , "Stipulate" , "Insistent request" , "Claim as due or just" , "Necessitate" .)