Damage caused by videocassette featuring maiden and Republican (6)

I believe the answer is:

tamper

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But I can't explain it at all! Could you help me understand?

(Other definitions for tamper that I've seen before include "Interfere (with something) without permission" , "'Alter or falsify, documents perhaps (6)'" , "Destructively interfere (with)" , "Interfere (with a thing)" , "Interfere or alter without authority" .)

I've seen this clue in The Hindu.

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