Crossword Genius

Poison in conflict well towards the centre? (8)

Ross

I believe the answer is:

warfarin

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

'poison' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's an association between them I don't understand?

'in conflict well towards the centre?' is the wordplay.
'in' is an insertion indicator.
'conflict' becomes 'war' (war is a kind of conflict).
'well' becomes 'arf' (I am not sure about this - if you are sure you should believe this answer much more).
'towards the centre?' becomes 'in' (as in moving in or closing in).
'war' going around 'arf' is 'warfar'.
'warfar'+'in'='WARFARIN'

Can you help me to learn more?

(Other definitions for warfarin that I've seen before include "thinner" , "Rat poison; drug" , "Pest controller" , "rodent poison" , "Type of poison" .)

I've seen this clue in The Guardian.
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