Rejects whistleblower's point on what's in the museum to handover (8)
I believe the answer is:
transfer
'handover' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for transfer that I've seen before include "Convey from one place to another" , "Relocate" , "Carry over" , "a side to side movement in soccer, perhaps" , "Make over (property to another)" .)