Unemployed, I had left employment originally (4)
I believe the answer is:
idle
'unemployed' is the definition.
('idle' is associated in meaning with 'unemployed')
'i had left employment originally' is the wordplay.
'i had' becomes 'id' (I'd).
'originally' suggests taking the first letters.
The initial letters of 'left employment' is 'le'.
'id'+'le'='IDLE'
(Other definitions for idle that I've seen before include "Workshy" , "Do nothing, laze" , "Inactive - lied (anag)" , "jobless" , "Hang about doing nothing" .)