Frightened about entering South Africa with communist (6)
I believe the answer is:
scared
'frightened' is the definition.
(scared means frightened or fearful)
'about entering south africa with communist' is the wordplay.
'about' becomes 'c' (circa).
'entering' is an insertion indicator.
'south africa' becomes 'SA' (abbreviation).
'with' is a charade indicator (letters next to each other).
'communist' becomes 'red' (red can informally mean communist).
'c' placed inside 'sa' is 'sca'.
'sca'+'red'='SCARED'
(Other definitions for scared that I've seen before include "Frightened, alarmed" , "having kittens" , "Thing which precipitates an event" , "in fright" , "Frightened or apprehensive" .)