A horse hit hard — so turned to shoer? (10)

I believe the answer is:

anagrammed

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'turned to shoer?' is the definition.
I can't tell whether this definition defines the answer.

'a horse hit hard' is the wordplay.
'horse' becomes 'nag' (term for an old horse).
'hit hard' becomes 'rammed' (I've seen this in another clue).
'a'+'nag'+'rammed'='ANAGRAMMED'

'so' acts as a link.

Can you help me to learn more?

(Other definitions for anagrammed that I've seen before include "made quite quiet, for example" , "Moved around" .)

I've seen this clue in The Times.

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