Person employed in parcel transport (4)
I believe the answer is:
celt
'person' is the definition.
The answer is an example.
'employed in parcel transport' is the wordplay.
'employed in' says the answer is hidden in the clue.
'CELT' is hidden within 'parcel transport'.
(Other definitions for celt that I've seen before include "Pre-Roman inhabitant of Ireland and Britain" , "Ancient Briton" , "Early European" , "one who spoke Manx, for example" , "Early Briton" .)