The most common and most likely answer to this crossword clue is the 5 plus 3 letter word ASWAN DAM
I've seen this crossword clue in The Daily Telegraph
A
S
W
A
N
D
A
M
More clues leading to the result ASWAN DAM
- First man to hold pen maybe creating massive barrier
- A river bird and parent create Nile blockage
- First bloke to carry bird across the Nile?
- Bird entertained by boy in garden, holder of massive flower
- River feature, one parent of ugly ducklings?
- A bird with mother somewhere in Egypt
- Like a man taking staff to a well-known embankment?
- Wanda goes inside a small structure on the Nile
- A large bird — cuckoo — reflected in Nile landmark
Buddy explains!

The straight part
We know that "somewhere in Egypt" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case somewhere in egypt = aswan dam.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.