Small county originally incredibly nice and picturesque (6)
I believe the answer is:
scenic
'picturesque' is the definition.
(I've seen this in another clue)
'small county originally incredibly nice' is the wordplay.
'originally' says to take the initial letters.
'incredibly' is an anagram indicator.
The initial letters of 'small county' is 'sc'.
'nice' with letters rearranged gives 'enic'.
'sc'+'enic'='SCENIC'
'and' is the link.
(Other definitions for scenic that I've seen before include "Like lovely countryside" , "Having nice views along the route" , "Relating to the stage" , "Having nice views along the way" , "Providing beautiful views" .)