Like a soufflé, if everything goes well (5)
I believe the answer is:
risen
'like a souffle if everything goes well' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for risen that I've seen before include "stirred" , "Moved up" , "Sprung up" , "Out of bed" , "(Having) come up" .)