Some folksy arts are on the rise but getting lost (6)
I believe the answer is:
astray
'lost' is the definition.
(synonyms)
'some folksy arts are on the rise' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'on the rise' shows that the letters should be reversed in order (in a down clue, letters go up).
'yartsa' is hidden within 'folksy arts are'.
'yartsa' backwards is 'ASTRAY'.
'but getting' is the link.
(Other definitions for astray that I've seen before include "Going wrong" , "Off course - wrong - misled" , "Gone off the right path" , "Off target" , "wrong way" .)