Point to the Spanish swimmer (3)
I believe the answer is:
eel
'swimmer' is the definition.
(eel is a type of fish)
'point to the spanish' is the wordplay.
'point' becomes 'E' (compass point).
'to the spanish' becomes 'el' ('the' in Spanish).
'e'+'el'='EEL'
(Other definitions for eel that I've seen before include "Slimy fish" , "Slithery fish" , "Creature like conger or moray" , "Snake-like sea creature" , "Teleost fish" .)