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Mad race to run atomic device (7)

Ross

I believe the answer is:

reactor

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

'atomic device' is the definition.
'reactor' can be an answer for 'device' (reactor is a kind of device). I am unsure of the 'atomic' bit.

'mad race to run' is the wordplay.
'mad' indicates anagramming the letters.
'run' becomes 'r' (cricket abbreviation).
'race'+'to'='raceto'
'raceto' anagrammed gives 'reacto'.
'reacto'+'r'='REACTOR'

Can you help me to learn more?

(Other definitions for reactor that I've seen before include "source of power, perhaps" , "device for generating energy" , "Nuclear power station core" , "See 3 Down" , "Apparatus for production of nuclear energy" .)

I've seen this clue in The Sun.
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