Carry first of parcels by drone (4)
I believe the answer is:
hump
'carry' is the definition.
(thesaurus)
'first of parcels by drone' is the wordplay.
'first of' says to take the initial letters.
'by' is a charade indicator (letters next to each other).
'drone' becomes 'hum' (I've seen this before**).
The first letter of 'parcels' is 'p'.
'p' after 'hum' is 'HUMP'.
(Other definitions for hump that I've seen before include "Hunch - sulks" , "A dromedary has one" , "Carry (heavy loads) (informal)" , "Protuberance; (the) sulks" , "What you get" .)