Accidentally annoy Egypt's leader, an arbitrary individual (6)
I believe the answer is:
anyone
'an arbitrary individual' is the definition.
I know nothing about this answer so I can't tell whether this works.
'accidentally annoy egypt's leader' is the wordplay.
'accidentally' is an anagram indicator (a chaotic or accidental ordering of the letters).
'leader' indicates taking the first letters.
The initial letter of 'egypts' is 'e'.
'annoy' is an anagram of 'anyon'.
'anyon'+'e'='ANYONE'
Can you help me to learn more?
(Other definitions for anyone that I've seen before include "No particular person" , "A person in general" , "Whoever" , "Pick a person - doesn't matter who" , "A random person" .)