Clauses not made clear in diplomat's offices (10)

I believe the answer is:

consulates

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'clear in diplomat's offices' is the definition.
The definition and answer can be both man-made objects as well as being plural nouns.
Maybe they are linked in a way I don't understand?

'clauses not made' is the wordplay.
'made' indicates an anagram.
'clauses'+'not'='clausesnot'
'clausesnot' is an anagram of 'CONSULATES'.

Can you help me to learn more?

(Another definition for consulates that I've seen is " diplomats in these".)

I've seen this clue in The Irish Times.

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