Serene joy (5)
'serene joy' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for bliss that I've seen before include "Serene joy" , "State of euphoria" , "Felicity" , "'Where ignorance is ....., 'tis folly to be wise'" , "Sir Arthur --, British composer" .)
(Other definitions for glee that I've seen before include "Mirth - part-song" , "Joy; part-song" , "Part-song for male voices - delight" , "Jewelled headband" , "Elation" .)