Negative - new break is continuous (3,4)
I believe the answer is:
non stop
'continuous' is the definition.
(I've seen this before)
'negative new break' is the wordplay.
'negative' becomes 'no' (no is a kind of negative).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'break' becomes 'stop' (both can mean to malfunction or stop working).
'no'+'n'+'stop'='NON-STOP'
'is' acts as a link.
(Other definitions for non stop that I've seen before include "endlessly" , "without interruption" , "without a break" , "Endless" , "ceaselessly" .)