Adult abandons fight over oxygen container (6)

I believe the answer is:

bottle

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'container' is the definition.
(bottle is a kind of container)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for bottle that I've seen before include "Glass liquid container or slang courage" , "confidence" , "Here's where it's to be found" , "beer found in this?" , "Glass container or slangy courage" .)

I've seen this clue in The Guardian.

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