One turning wheel in Amherst crashed (7)

I believe the answer is:

hamster

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'one turning wheel' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

'amherst crashed' is the wordplay.
'crashed' is an anagram indicator.
'amherst' is an anagram of 'HAMSTER'.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for hamster that I've seen before include "Animal" , "The arms (anag)" , "one running round in circles?" , "Oddly, the arms of a rodent" , "Common pet rodent" .)

I've seen this clue in The Sun.

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