Jam, ham, or assorted sandwiches? (6)
I believe the answer is:
morass
'jam' is the definition.
(thesaurus)
'ham or assorted sandwiches?' is the wordplay.
'sandwiches?' indicates the answer is hidden within the clue (the solution is sandwiched in by the clue).
'MORASS' can be found hidden inside 'ham or assorted'.
(Other definitions for morass that I've seen before include "dangerous situation" , "Slough, bog" , "complicated situation" , "mess" , "Area of marshy or swampy ground" .)