Answer:

tampered

AnswerCrossword Clue
TAMPEREDFiddled (with)
TAMPEREDMeddled
TAMPEREDMeddled (with).
TAMPEREDMeddled.
TAMPERED... with (interfered)
TAMPEREDInterfered
TAMPEREDFooled (with)
TAMPEREDTinkered (with)
TAMPEREDInterfered with