Rescue dog losing its tail (8)

I believe the answer is:

retrieve

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

I don't understand the remainder of the clue.

(Other definitions for retrieve that I've seen before include "Get back (lost item)" , "Rescue" , "(Of dog) fetch shot game" , "Search for and discover" , "Go for and bring back" .)

I've seen this clue in The Telegraph.

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