New game not of interest to motorists (7)

I believe the answer is:

magneto

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'interest to motorists' is the definition.
I can't judge whether this defines the answer.

'new game not' is the wordplay.
'new' indicates anagramming the letters.
'game'+'not'='gamenot'
'gamenot' is an anagram of 'MAGNETO'.

'of' is the link.

Can you help me to learn more?

(Other definitions for magneto that I've seen before include "Ignition apparatus" , "kindles a spark" , "generation device" , "Car generator" , "car component" .)

I've seen this clue in The Globe and Mail.

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