A large bird -- cuckoo -- reflected in Nile landmark (5,3)
I believe the answer is:
aswan dam
'nile landmark' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'a large bird cuckoo reflected' is the wordplay.
'large bird' becomes 'swan' (swan is a kind of bird. I am not sure about the 'large' bit.).
'cuckoo' becomes 'mad' (I've seen this in another clue).
'reflected' says the letters should be written backwards.
'mad' backwards is 'dam'.
'a'+'swan'+'dam'='ASWAN DAM'
'in' is the link.
Can you help me to learn more?
(Other definitions for aswan dam that I've seen before include "Egyptian water barrier" , "Egypt's lake district" , "Nile construction of 1902" , "Huge structure in Africa" , "massive barrier" .)