Prosecute meat company finally regarding quantities of fat (5)

I believe the answer is:
suety
'fat' is the definition.
(similar in meaning)
'prosecute meat company finally' is the wordplay.
'prosecute' becomes 'sue' (I've seen this before).
'finally' indicates one should take the final letters.
The last letters of 'meat company' are 'ty'.
'sue'+'ty'='SUETY'
'regarding quantities of' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
I've seen this clue in The Independent.
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