Heavy and unappetising (6)
I believe the answer is:
stodgy
'heavy and unappetising' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for stodgy that I've seen before include "(Of food) heavy, rich" , "Boringly conventional" , "not easily assimilated" , "(Of food) solid and heavy" , "Heavy and sticky" .)