He went with Flinders for fish (4)

I believe the answer is:

bass

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'for fish' is the definition.
(bass is a kind of fish)

I cannot understand how the remainder of the clue works.

(Other definitions for bass that I've seen before include "Scottish rock" , "Freshwater fish and lowest voice" , "Fish - low voice" , "Large percussion instrument" , "Fish - low in pitch" .)

I've seen this clue in the Sydney Morning Herald.

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