One having scaly body and feathers round neck (3)
I believe the answer is:
boa
I believe this clue is a double definition.
'one having scaly body' is the first definition.
(type of snake)
'feathers round neck' is the second definition.
(a feather boa)
'and' is the link.
(Other definitions for boa that I've seen before include "One covered in scales" , "feathers around the neck?" , "Non-venomous snake" , "that's dangerous for South Americans" , "... cold-blooded creature" .)