Go on turning employer against me (6)
I believe the answer is:
resume
'go on' is the definition.
(resuming is a kind of going on)
'turning employer against me' is the wordplay.
'turning' says the letters should be written backwards.
'employer' becomes 'user' (someone who employs or uses something).
'against' is a charade indicator (letters next to each other).
'user' written backwards gives 'resu'.
'resu'+'me'='RESUME'
(Other definitions for resume that I've seen before include "proceed" , "CV (US)" , "Begin where you left off" , "Continue after a break" , "Pick up again" .)