Hit man is out to bury Conservative factory worker (9)
I believe the answer is:
machinist
'factory worker' is the definition.
(I've seen this before)
'hit man is out to bury conservative' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'to bury' indicates putting letters inside (inserted letters are buried inside).
'conservative' becomes 'C' (UK political abbreviation).
'hit'+'man'+'is'='hitmanis'
'hitmanis' anagrammed gives 'mahinist'.
'mahinist' going around 'c' is 'MACHINIST'.
(Other definitions for machinist that I've seen before include "Engineer" , "Eg, lathe operator" , "Person operating device" , "Industrial operator" , "One working on a device" .)