Yokel is curt, sadly (6)
I believe the answer is:
rustic
'yokel' is the definition.
(I've seen this before)
'is curt sadly' is the wordplay.
'sadly' is an anagram indicator.
'is'+'curt'='iscurt'
'iscurt' anagrammed gives 'RUSTIC'.
(Other definitions for rustic that I've seen before include "someone to represent the country?" , "Hodge" , "Rural, countrified" , "Countryman or countrified" , "Relating to the countryside" .)