Fish captain primarily shipped to East End (7)

I believe the answer is:

kippers

I'm a little stuck... Click here to teach me more about this clue!

'fish' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

(Other definitions for kippers that I've seen before include "Smoked fish" , "Smoked herrings for skipper" , "in bed?" , "Have they dropped off" , "Food for those that have smoked" .)

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