Change colours, perhaps, to hide electronic flaw in photo
I believe the answer is:
redeye
'change' is the definition.
(redeye is a kind of change)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for redeye that I've seen before include "Describes the first flight in the morning" , "Flash-induced effect on photo" , "early flight" , "Photographic fault" , "flash result" .)