Southern countryside originally incredibly nice and picturesque (6)
I believe the answer is:
scenic
'picturesque' is the definition.
(I've seen this before)
'southern countryside originally incredibly nice' is the wordplay.
'originally' says to take the initial letters.
'incredibly' indicates an anagram.
The first letters of 'southern countryside' is 'sc'.
'nice' anagrammed gives 'enic'.
'sc'+'enic'='SCENIC'
'and' is the link.
(Other definitions for scenic that I've seen before include "Like lovely countryside" , "Like beautiful landscape" , "This route has nice scenery" , "This route has picturesque views" , "Like an impressive view" .)