"Over my dead body!” (5)
'over my dead body' is the definition.
(phrase meaning 'I will never let that happen')
This is the entire clue.
(Other definitions for never that I've seen before include "when hell freezes over?" , "'It's now or - - ' (14 song)" , "On no account" , "Not ever" , "At no time whatever" .)
(Another definition for nofear that I've seen is " Definitely not".)