Electrician includes publicity for motor parts (5-5)

I believe the answer is:

spark-plugs

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'motor parts' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'electrician includes publicity' is the wordplay.
'electrician' becomes 'sparks' (I've seen this before).
'includes' means one lot of letters goes inside another.
'publicity' becomes 'plug' (plug is a kind of publicity).
'sparks' going around 'plug' is 'SPARK-PLUGS'.

'for' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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