Artist in bog muddled situation (6)
I believe the answer is:
morass
'muddled situation' is the definition.
(I've seen this in another clue)
'artist in bog' is the wordplay.
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'in' indicates putting letters inside.
'bog' becomes 'moss' (Scottish term for a bog).
'ra' put within 'moss' is 'MORASS'.
(Other definitions for morass that I've seen before include "mess" , "Swampy, low-lying land" , "Mire, quagmire" , "Slough, bog" , "Area of marshy or swampy ground" .)