Following concert, Sue comes back over the moon (10)
I believe the answer is:
prometheus
'moon' is the definition.
(moon of Saturn)
'following concert sue comes back over the' is the wordplay.
'following' means one lot of letters go next to another.
'concert' becomes 'prom' (abbreviation for promenade concert).
'comes back' is a reversal indicator.
'over' is an insertion indicator.
'sue' in reverse letter order is 'eus'.
'eus' going around 'the' is 'etheus'.
'prom'+'etheus' is 'PROMETHEUS'.
(Other definitions for prometheus that I've seen before include "I stole fire" , "Prominent Greek" , "Fire-stealing Titan" , "He was bound" , "Greek god" .)