Paint roller covers preliminary section (5)
I believe the answer is:
intro
'preliminary section' is the definition.
(I've seen this before)
'paint roller covers' is the wordplay.
'covers' says the answer is hidden in the clue (I've seen 'covering' mean this).
'INTRO' is hidden within 'paint roller'.
(Other definitions for intro that I've seen before include "Lead" , "Opening notes" , "this may get one started" , "First passage of play" , "Song's opening" .)