Incompetent and disorganised mad tailor (9)
I believe the answer is:
maladroit
'incompetent' is the definition.
(thesaurus)
'disorganised mad tailor' is the wordplay.
'disorganised' indicates an anagram.
'mad'+'tailor'='madtailor'
'madtailor' with letters rearranged gives 'MALADROIT'.
'and' is the link.
(Other definitions for maladroit that I've seen before include "Inept, clumsy" , "Inefficient, clumsy" , "Awkward - unskilful" , "Clumsy or bungling, ham-fisted" .)