New designer left job (8)
I believe the answer is:
resigned
'left job' is the definition.
(to resign is to leave a job)
'new designer' is the wordplay.
'new' indicates anagramming the letters.
'designer' is an anagram of 'RESIGNED'.
(Other definitions for resigned that I've seen before include "Long-suffering" , "Calmly submissive" , "Gave up one's job" , "Left post" , "Gave up a position" .)