A redneck's vacuous articles about South American (8)
I believe the answer is:
arkansan
'american' is the definition.
(Arkansan is an example)
'a redneck's vacuous articles about south' is the wordplay.
'vacuous' means to remove the middle letters.
'articles' becomes 'anan' (two examples of the part-of-speech: an+an**).
'about' means one lot of letters goes inside another.
'south' becomes 's' ('S' can be a synonym of 'south').
'redneck' with its middle taken out is 'rk'.
'anan' going around 's' is 'ansan'.
'a'+'rk'+'ansan'='ARKANSAN'
(Other definitions for arkansan that I've seen before include "From a south-eastern US state" , "Native of Little Rock, US" .)