Crossword Genius

Making things very small? He cannot, sadly! (8)

Ross

I believe the answer is:

nanotech

I'm a little stuck... Click here to teach me more about this clue!

'making things very small?' is the definition.
I know nothing about this answer so I can't tell whether this works.

'he cannot sadly' is the wordplay.
'sadly' indicates anagramming the letters.
'he'+'cannot'='hecannot'
'hecannot' is an anagram of 'NANOTECH'.

Can you help me to learn more?

(Another definition for nanotech that I've seen is " Very little science".)

I've seen this clue in The Times.
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