Breast-bone turns me around! (7)

I believe the answer is:

sternum

I'm a little stuck... Click here to teach me more about this clue!

'breast-bone' is the definition.
I can't judge whether this definition defines the answer.

'turns me around' is the wordplay.
'around' indicates an anagram.
'turns'+'me'='turnsme'
'turnsme' is an anagram of 'STERNUM'.

Can you help me to learn more?

(Other definitions for sternum that I've seen before include "Munster (anag.)" , "big bone" , "Chest bone" , "Breastbone" , "somewhere in chest" .)

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

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