Crossword Genius

Poison in canned beef? (5)

Ross

I believe the answer is:

toxin

'poison' is the definition.
(toxin is a kind of poison)

'in canned beef' is the wordplay.
'in' is an insertion indicator.
'canned' becomes 'tin' (I can't explain this - if you can you should give a lot more credence to this answer).
'beef' becomes 'ox'.
'tin' placed around 'ox' is 'TOXIN'.

(Other definitions for toxin that I've seen before include "Poison, venom" , "Poison of organic origin" , "Poisonous substance" , "Natural poison" , "Form of poison" .)

I've seen this clue in The Sun and The Times.
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