They transmit power in genes perhaps (7)

I believe the answer is:

engines

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'they transmit power' is the definition.
The definition suggests an adverb but the answer is not.

'in genes perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'in'+'genes'='ingenes'
'ingenes' with letters rearranged gives 'ENGINES'.

Can you help me to learn more?

(Other definitions for engines that I've seen before include "Motors" , "Machines that convert power into motion" , "Powerful machines" , "Locomotives" .)

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

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