Shocking swimmer’s return, on swallowing frozen water by lake (8,3)
I believe the answer is:
electric eel
'shocking swimmer's' is the definition.
(I've seen this in another clue)
'return on swallowing frozen water by lake' is the wordplay.
I cannot quite see how this works, but
'return' could be 'elect' (I've seen this before) and 'elect' is located in the answer.
'frozen' could be 'ice' (I've seen this in other clues) and 'ice' is present in the answer.
'on' could be 're' ('on' can be mean 'with reference to') and 're' is present in the leftover letters.
'lake' could be 'l' (geographical abbreviation) and 'l' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for electric eel that I've seen before include "Shocking fish" , "shocker" .)