Look, media queries regularly reveal a compulsion to match colleagues (4,8)
I believe the answer is:
peer pressure
'a compulsion to match colleagues' is the definition.
(compulsion to follow one's peers)
'look media queries regularly' is the wordplay.
'look' becomes 'peer' (peering is a kind of looking).
'media' becomes 'press' (the press is part of the media).
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
The alternating letters of 'queries' are 'ure'.
'peer'+'press'+'ure'='PEER PRESSURE'
'reveal' is the link.
(Other definitions for peer pressure that I've seen before include "Compulsion to conform to one's contemporaries" , "The effect of one's fellows on behaviour" , "that whips people into line?" , "The influence of the Lords" , "Influence of one's contemporaries" .)