Software that harms six devices (7)

I believe the answer is:

viruses

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'software that harms' is the definition.
Although both the answer and 'software' are nouns, they are not in the same form of the noun.

'six devices' is the wordplay.
'six' becomes 'VI' (Roman numerals).
'devices' becomes 'ruses' (I've seen this in another clue).
'vi'+'ruses'='VIRUSES'

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(Other definitions for viruses that I've seen before include "Computer wreckers" , "Infectious agents that replicate within cells of living hosts" , "Infective agents" .)

I've seen this clue in The Daily Express.

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