Plant right inside African country (5)
I believe the answer is:
chard
'plant' is the definition.
(chard plant is a kind of plant)
'right inside african country' is the wordplay.
'right' becomes 'r' (common abbreviation).
'inside' is an insertion indicator.
'african country' becomes 'chad' (country in Africa).
'r' put inside 'chad' is 'CHARD'.
(Other definitions for chard that I've seen before include "Variety of beet with edible leaves" , "Vegetable; Somerset town" , "Leafy green" , "Vegetable with edible leaves and stalks" , "Beet with edible leaves and stalks" .)