Ways of thinking produced by more than one starting for all sides today (7)

I believe the answer is:

schools

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'ways' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe you can see an association between them that I can't see?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for schools that I've seen before include "Places of instruction" , "Coaches, trains" , "Colleges" , "Institutions of learning" , "Educates" .)

I've seen this clue in The Irish Times.

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