One sinking beneath the waves? (7)
I believe the answer is:
torpedo
'one sinking beneath the waves?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
This is all the clue.
Can you help me to learn more?
(Other definitions for torpedo that I've seen before include "Weapon travelling under water" , "fish you want" , "Sea-borne missile" , "Naval weapon" , "Explosive underwater projectile" .)
