Show superhero, say, in image on computer (11)
I believe the answer is:
screensaver
'in image on computer' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'show superhero' is the wordplay.
'show' becomes 'screen' (screen can mean to show a film).
'superhero' becomes 'saver' (I can't explain this - if you can you should give a lot more credence to this answer).
'screen'+'saver'='SCREENSAVER'
'say' acts as a link.
Can you help me to learn more?
(Other definitions for screensaver that I've seen before include "what slide show may be used for" , "Damage-reducing program for computer monitor" , "appearance of idle display" .)