An X where ducks are in America (6,3,4)
I believe the answer is:
across the pond
'america' is the definition.
(I've seen this before)
'an x where ducks' is the wordplay.
I cannot quite see how this works, but
'an' could be 'a' and 'a' is located in the answer.
'x' could be 'cross' (I've seen this before) and 'cross' is found in the answer.
This explanation may well be incorrect...
'are in' is the link.
Can you help me to learn more?
(Another definition for across the pond that I've seen is " America".)