Geneticist driving pupil longing to control second floor (7)

I believe the answer is:

lysenko

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'geneticist driving' is the definition.
The definition suggests a singular noun which matches the answer.

'pupil longing to control second floor' is the wordplay.
'pupil' becomes 'l'.
'longing' becomes 'yen' (yen is a kind of longing).
'to control' means one lot of letters goes inside another.
'second' becomes 's' (common abbreviation).
'floor' becomes 'ko' (I've seen this in other clues).
'yen' going around 's' is 'ysen'.
'l'+'ysen'+'ko'='LYSENKO'

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I've seen this clue in The Telegraph.

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