West Indies, perhaps getting over just after duck (6)
I believe the answer is:
wigeon
'duck' is the definition.
(I know that wigeon is a type of duck)
'west indies perhaps getting over just after' is the wordplay.
'west indies' becomes 'wi'.
'perhaps' becomes 'eg' (for example).
'getting over' says the letters should be written in reverse (flipped over).
'just after' becomes 'on'.
'eg' reversed gives 'ge'.
'wi'+'ge'+'on'='WIGEON'
(Other definitions for wigeon that I've seen before include "Duck, related to mallard and teal" , "flier" , "Type of duck" , "Duck with whistling call" , "Breed of duck" .)