Comfort in time of disappointment or sorrow (6)
I believe the answer is:
solace
'comfort in time of disappointment or sorrow' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for solace that I've seen before include "Comfort in time of disappointment or sorrow" , "Comfort and reassurance" , "Kind of comfort - a close thing" , "Something that comforts distress" , "Comport" .)