A crime in Egypt's capital seems absurd (7)
I believe the answer is:
asinine
'absurd' is the definition.
(I've seen this before)
'a crime in egypt's capital' is the wordplay.
'crime' becomes 'sin'.
'capital' suggests taking the first letters.
The initial letter of 'egypts' is 'e'.
'a'+'sin'+'in'+'e'='ASININE'
'seems' acts as a link.
(Other definitions for asinine that I've seen before include "Foolish like donkey" , "simple" , "'Mindless, vacuous (7)'" , "Extremely stupid or foolish" , "In the nature of supposedly stupid animal" .)