Inept tailor made incomplete pants (9)
I believe the answer is:
maladroit
'inept' is the definition.
(maladroit can mean inept or clumsy)
'tailor made incomplete pants' is the wordplay.
'incomplete' means to remove the last letter.
'pants' indicates an anagram (UK informal term for 'nonsense' or 'rubbish').
'tailor'+'made'='tailormade'
'tailormade' with its final letter taken off is 'tailormad'.
'tailormad' anagrammed gives 'MALADROIT'.
(Other definitions for maladroit that I've seen before include "Inept, clumsy" , "Inefficient, clumsy" , "Clumsy or bungling, ham-fisted" , "Awkward - unskilful" .)