Poor victim of sport (4)

I believe the answer is:

fish

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

'poor victim' is the definition.
'fish' can be an answer for 'victim' (fish is a kind of victim). I'm unsure of the 'poor' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for fish that I've seen before include "Search" , "rock, perhaps" , "To try to catch" , "Angle; trawl" , "Swimmer" .)

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