Joyful story about Miliband? (6)
I believe the answer is:
elated
'joyful' is the definition.
(synonyms)
'story about miliband?' is the wordplay.
'story' becomes 'tale' (synonyms).
'about' says the letters should be written in reverse.
'miliband?' becomes 'ed' (I've seen this in other clues).
'tale' back-to-front is 'elat'.
'elat'+'ed'='ELATED'
(Other definitions for elated that I've seen before include "Overjoyed, happy and excited" , "In high spirits, very pleased" , "Overjoyed, in high spirits" , "Blissful" , "Over the moon" .)