Poor conductor thrown off soul train (9)

I believe the answer is:

insulator

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'poor conductor thrown' is the definition.
I can't judge whether this defines the answer.

'off soul train' is the wordplay.
'off' is an anagram indicator.
'soul'+'train'='soultrain'
'soultrain' with letters rearranged gives 'INSULATOR'.

Can you help me to learn more?

(Other definitions for insulator that I've seen before include "safety device" , "Non-conducting solid" , "Non-conducting material" , "Non-conductor" .)

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

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