Promise pickle or jam (6)
I believe the answer is:
plight
This clue is a triple definition!
'promise' is the first definition.
(plighting is a kind of promising)
'pickle' is the second definition.
(I've seen this before)
'or' is a link.
'jam' is the third definition.
(I've seen this before)
(Other definitions for plight that I've seen before include "State" , "Pledge; predicament" , "pickle" , "A serious or difficult situation" , "Promise - trouble" .)