A moving toy at rest in breakdown! (5,3)

I believe the answer is:

train set

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'a moving toy' is the definition.
'train set' can be an answer for 'toy' (train set is a type of toy). I am unsure of the 'a moving' bit.

'at rest in breakdown' is the wordplay.
'breakdown' is an anagram indicator.
'at'+'rest'+'in'='atrestin'
'atrestin' anagrammed gives 'TRAIN-SET'.

Can you help me to learn more?

(Other definitions for train set that I've seen before include "model railway" , "little loco with this?" , "Number of tracked items" , "Toy for dads?" , "Layout with engines" .)

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

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