A chap who’s employed by the CIA? (5)
I believe the answer is:
agent
'employed by the cia?' is the definition.
I can't judge whether this defines the answer.
'a chap' is the wordplay.
'chap' becomes 'gent' (both can mean a man).
'a'+'gent'='AGENT'
'who's' acts as a link.
Can you help me to learn more?
(Other definitions for agent that I've seen before include "Catalyst" , "One's representative" , "Delegate" , "Person who does business on behalf of another" , "Bond, e.g." .)