Aquatic reptile (6)
'aquatic reptile' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for turtle that I've seen before include "Shelled marine creature" , "Aquatic chelonian" , "marine animal" , "Sea-creature resembling tortoise" , "Kind of sea-tortoise, noted for soup" .)
'aquatic reptile' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for crocodile that I've seen before include "Recoil, doc, from the reptile" , "Predatory reptile" , "Large reptile with long jaws" , "Vicious beast" , "Large aquatic reptile" .)