Something injected ruins meat, sadly (9)

I believe the answer is:

antiserum

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'something injected' is the definition.
I can't tell whether this definition defines the answer.

'ruins meat sadly' is the wordplay.
'sadly' is an anagram indicator.
'ruins'+'meat'='ruinsmeat'
'ruinsmeat' is an anagram of 'ANTISERUM'.

Can you help me to learn more?

(Other definitions for antiserum that I've seen before include "Medicinal fluid" , "bloody stuff" , "treatment against disease" , "shot" , "Injection; I'm at nurse (anag.)" .)

I've seen this clue in The Times.

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