Pleasing noises from Brussels; they're not genuine (9)

I believe the answer is:

euphonies

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

'brussels they're not genuine' is the wordplay.
'brussels' becomes 'EU' (European Parliament is based in Brussels).
'they're not genuine' becomes 'phonies' (I can't justify this - if you can you should give a lot more credence to this answer).
'eu'+'phonies'='EUPHONIES'

'from' acts as a link.

Can you help me to learn more?

I've seen this clue in The Telegraph.

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