The most common and most likely answer to this crossword clue is the 4 letter word COPT
I've seen this crossword clue in The Guardian
C
O
P
T
Buddy explains!
The straight part
We know that "Faithful chap from Egypt" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case faithful chap from egypt = copt.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.
What does COPT mean?
COPT verb- To obtain, to purchase (as in drugs), to get hold of, to take.
- To (be forced to) take; to receive; to shoulder; to bear, especially blame or punishment for a particular instance of wrongdoing.
- (trainspotting) To see and record a railway locomotive for the first time.
- To steal.
- To adopt.
- To earn by bad behavior.
- (usually with “to”) to admit, especially to a crime.
- For a pimp to recruit a prostitute into the stable.