Fish from the Lee? (3)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
eel
(Other definitions for eel that I've seen before include "Snakelike fish" , "Unagi, in a sushi bar" , "Proverbially slippery fish" , "Electric swimmer, perhaps?" , "Slippery swimmer (may be jellied)" .)