Tamper with bones (6)
I believe the answer is:
doctor
I believe this clue is a double definition.
'tamper with' is the first definition.
(as in doctoring or manipulating an image)
'bones' is the second definition.
(I've seen this before)
(Other definitions for doctor that I've seen before include "Medical specialist" , "Who, for example" , "Medical practitioner, for instance" , "GP" , "Medical worker or holder of highest university degree" .)