Record-breaking train (7)
I believe the answer is:
mallard
(Other definitions for mallard that I've seen before include "Variety of duck" , "The famous steam train" , "Oldest breed of duck" , "Common wild duck" , "web-footed bird" .)
I believe the answer is:
mallard
(Other definitions for mallard that I've seen before include "Variety of duck" , "The famous steam train" , "Oldest breed of duck" , "Common wild duck" , "web-footed bird" .)