Call of captain for ends? (5)

I believe the answer is:

tails

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'for ends?' is the definition.
(tail is a kind of end)

I cannot understand how the remainder of the clue works.

(Other definitions for tails that I've seen before include "Follows closely" , "Animals' extremities" , "A possible fall of the pound" , "the back of bears - bulls too" , "Gambler's choice" .)

I've seen this clue in The Globe and Mail.

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