Hit record swapped on hard disk image (8)
I believe the answer is:
hologram
'image' is the definition.
(hologram is a kind of image)
'hit record swapped on hard disk' is the wordplay.
'hit' becomes 'ram' (ram can mean to hit something).
'record' becomes 'log' (logging is a kind of recording).
'swapped' means one lot of letters go next to another.
'on' means one lot of letters go next to another.
'hard disk' becomes 'ho' (I can't justify this - if you can you should give a lot more credence to this answer).
'ram' put after 'log' is 'logram'.
'logram' put after 'ho' is 'HOLOGRAM'.
Can you help me to learn more?
(Other definitions for hologram that I've seen before include "Three-dimensional image or representation" , "Three-D laser image" , "Three-dimensional image created on film" , "Three D image" , "Photo" .)