The samurai somehow becoming clumsy (10)
I believe the answer is:
amateurish
'clumsy' is the definition.
(thesaurus)
'the samurai somehow' is the wordplay.
'somehow' indicates an anagram.
'the'+'samurai'='thesamurai'
'thesamurai' is an anagram of 'AMATEURISH'.
'becoming' acts as a link.
(Other definitions for amateurish that I've seen before include "Rather 31 across" , "Not very professional" , "using little craft, perhaps" , "Unprofessional" , "Lay" .)