Place in frame to display prominently (6)
I believe the answer is:
splash
'display prominently' is the definition.
(I've seen this before)
'place in frame' is the wordplay.
'place' becomes 'pl' (I've seen this in other clues).
'in' is an insertion indicator.
'frame' becomes 'sash' (sash is a kind of frame**).
'pl' placed inside 'sash' is 'SPLASH'.
'to' acts as a link.
(Other definitions for splash that I've seen before include "major news item" , "Bright patch of colour; cause water to fly" , "Effect of body hitting water" , "Publicity" , "coming down of an astronaut" .)