Swamp crocodilian (9)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
alligator
(Other definitions for alligator that I've seen before include "What can go with pear" , "Broad-snouted snapper?" , "beast to be seen in due course?" , "Predatory cold-blooded killer" , "Large aquatic reptile" .)