They act diplomatically so envy is disguised (6)

I believe the answer is:

envoys

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'they act diplomatically' is the definition.
The definition suggests an adverb but the answer is not.

'so envy is disguised' is the wordplay.
'is disguised' indicates an anagram.
'so'+'envy'='soenvy'
'soenvy' anagrammed gives 'ENVOYS'.

Can you help me to learn more?

(Other definitions for envoys that I've seen before include "Diplomatic messengers" , "Diplomatic emissaries" , "Messengers, emissaries" .)

I've seen this clue in The Globe and Mail.

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