Time left-wing Mirror covers undue bureaucracy? (3,4)
I believe the answer is:
red tape
'undue bureaucracy?' is the definition.
(red tape means excessive bureaucracy)
'time left-wing mirror covers' is the wordplay.
'time' becomes 't' (abbreviation).
'left wing' becomes 'red' (red can informally mean communist).
'mirror' becomes 'ape' (both can mean to imitate or copy).
'covers' indicates putting letters inside.
'red'+'ape'='redape'
't' inserted within 'redape' is 'RED-TAPE'.
(Other definitions for red tape that I've seen before include "What may be binding" , "legal agreement?" , "bureaucratic snarl-up?" , "Time consuming bureaucracy" , "European regulations?" .)