Though powerful, it's no good in a German article (6)

I believe the answer is:

engine

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'though powerful' is the definition.
I can't tell whether this defines the answer.

'no good in a german article' is the wordplay.
'no good' becomes 'ng' (abbreviation).
'in' is an insertion indicator.
'a german article' becomes 'eine' (indefinite article in German).
'ng' placed within 'eine' is 'ENGINE'.

'it's' acts as a link.

Can you help me to learn more?

(Other definitions for engine that I've seen before include "Mechanical device as source of power, a driver" , "Locomotive" , "Motor" , "machinery" , "Machine that converts energy into motion" .)

I've seen this clue in the Evening Standard.

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