Oil companies finally accepting international sanctions (5)

I believe the answer is:

fiats

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'sanctions' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Perhaps they are linked in a way I don't understand?

'oil companies finally accepting international' is the wordplay.
'oil' becomes 'fat'.
'finally' says to take the final letters.
'accepting' indicates putting letters inside.
'international' becomes 'i' (abbreviation eg in IMF).
The final letter of 'companies' is 's'.
'fat'+'s'='fats'
'fats' placed around 'i' is 'FIATS'.

Can you help me to learn more?

I've seen this clue in The Telegraph.

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