Carriage axle bush for instance (7)

I believe the answer is:

bearing

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'carriage' is the definition.
(I know that carriage can be written as bearing)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for bearing that I've seen before include "Demeanour - direction" , "Carriage; suffering" , "Manner - pivot - reference" , "Carriage; relevance" , "course" .)

I've seen this clue in The Irish News.

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