Extract from southern article (3)
I believe the answer is:
the
'article' is the definition.
(the definite article in English)
'extract from southern' is the wordplay.
'extract from' says the answer is hidden in the clue (I've seen this in other clues).
'THE' is hidden in the letters of 'southern'.
(Other definitions for the that I've seen before include "Last words of story" , "Base of ever-expanding nursery rhyme" , "15, 16 One given taste of own medicine" , "French drink" , "Over - - moon" .)