Temporary malfunction (6)
I believe the answer is:
glitch
'temporary malfunction' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for glitch that I've seen before include "Brief failure" , "'Bug, fault in a system (6)'" , "Sudden brief malfunction in electronic system" , "sudden hiccup" , "Failure to function" .)