Crossword Genius

Husband losing way — something fishy here! (7)

Ross

I believe the answer is:

herring

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'something fishy here' is the definition.
(herring is a type of fish)

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

Can you help me to learn more?

(Other definitions for herring that I've seen before include "Saltwater fish" , "Small silvery sea-fish" , "Fish, often kippered" , "Fish that's kippered" , "It's certainly fishy!" .)

I've seen this clue in The Independent.
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