Desktop image (4)
I believe the answer is:
icon
'desktop image' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for icon that I've seen before include "Devotional image (C, not K)" , "Holy painting" , "Holy image or symbol on computer screen" , "Image or statue, or symbol on computer screen" , "Sacred painting or representitive figure" .)