A shocking swimmer? (8,3)
I believe the answer is:
electric eel
'a shocking swimmer?' is the definition.
(I've seen this in another clue)
'shocking swimmer?' is the wordplay.
'shocking' becomes 'electric' (I can't explain this - if you can you should believe this answer much more).
'swimmer?' becomes 'eel' (eel is a type of fish).
'electric'+'eel'='ELECTRIC EEL'
Can you help me to learn more?
(Other definitions for electric eel that I've seen before include "shocker" , "Shocking fish" .)