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Fragmented particle the lecturer's introduced (8)

Ross

I believe the answer is:

shivered

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'introduced' is the definition.
The definition and answer can be both to do with motion as well as being past participle verbs.
Perhaps there's a link between them I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for shivered that I've seen before include "'Trembled, with cold or fear (8)'" , "showed signs of cold" , "Shook" , "Trembled, with cold say" .)

I've seen this clue in The Times.
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