Disorder created by politician in government (6)
I believe the answer is:
rumple
'disorder' is the definition.
(rumple can mean to crease or disorder)
'politician in government' is the wordplay.
'politician' becomes 'MP' (Member of Parliament).
'in' means one lot of letters goes inside another.
'government' becomes 'rule' (rule can mean government or control).
'mp' inserted within 'rule' is 'RUMPLE'.
'created by' is the link.
(Other definitions for rumple that I've seen before include "Wrinkle, make uneven" , "Make (eg, bed) untidy" , "disorder" , "Make untidy, say clothes" , "Make uneven or wrinkled" .)