Jet from Kentucky home first (4)
I believe the answer is:
inky
'jet' is the definition.
(thesaurus)
'kentucky home first' is the wordplay.
'kentucky' becomes 'ky'.
'home' becomes 'in' ('he's home' can mean 'he's in').
'first' is a charade indicator (letters next to each other).
'ky' after 'in' is 'INKY'.
'from' acts as a link.
(Other definitions for inky that I've seen before include "Jet" , "Black as pen fluid?" , "Dark; stained" , "Like writing fluid" , "Pitch-black" .)