Manage to inspire everyone? I will be a source of inspiration (8)
I believe the answer is:
calliope
'a source of inspiration' is the definition.
(I know that Calliope is a Muse)
'manage to inspire everyone? i' is the wordplay.
'manage' becomes 'cope' (manage can mean to cope or do well).
'to inspire' is an insertion indicator (breathe in).
'everyone?' becomes 'all' (all people).
'all'+'i'='alli'
'cope' going around 'alli' is 'CALLIOPE'.
'will be' acts as a link.
(Other definitions for calliope that I've seen before include "source of inspiration?" , "One of the Muses" , "Greek Muse of eloquence and epic poetry, or a kind of organ" , "One Muse" , "inspiration for poets" .)