Clickable image (4)
I believe the answer is:
icon
'clickable image' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for icon that I've seen before include "Image or statue, or symbol on computer screen" , "Image or representation" , "Representative symbol, may be on computer screen" , "Sacred painting or representitive figure" , "Image - sex symbol" .)