At which one got information directly from the original employee (5,4)
I believe the answer is:
first hand
'at which one got information directly from' is the definition.
The definition and answer are not the same part of speech.
'original employee' is the wordplay.
'original' becomes 'first' (associated in meaning).
'employee' becomes 'hand' (hand is a kind of employee).
'first'+'hand'='FIRST-HAND'
'the' acts as a link.
Can you help me to learn more?
(Other definitions for first hand that I've seen before include "Direct" , "directly" , "leading seaman?" .)