Marry Trim gossip from university with cultural surroundings (6)

I believe the answer is:

milieu

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'surroundings' is the definition.
('milieu' can be a synonym of 'surroundings')

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for milieu that I've seen before include "Environmental condition, surrounding" , "'Surroundings, setting (6)'" , "Environment - setting" , "Surroundings - location" , "(Social) setting" .)

I've seen this clue in the Irish Times.

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