Granny, shredding boot with this tiny machine... (7)

I believe the answer is:

nanobot

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'this tiny machine' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'granny shredding boot' is the wordplay.
'granny' becomes 'nan'.
'shredding' indicates an anagram.
'boot' anagrammed gives 'obot'.
'nan'+'obot'='NANOBOT'

'with' acts as a link.

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I've seen this clue in The Irish Times.

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