Six-footer in Kenyan trip (3)
I believe the answer is:
ant
'six-footer' is the definition.
(ants have six feet)
'in kenyan trip' is the wordplay.
'in' indicates a hidden word.
'ANT' is hidden in the letters of 'kenyan trip'.
(Other definitions for ant that I've seen before include "The insect lives in a social colony" , "` `Go to the ... thou sluggard' '" , "Little boy" , "Hill-dweller" , "Small social insect" .)