Exceptional man with great hope campaigning very vigorously? (2,3,7)
I believe the answer is:
on the rampage
'campaigning very vigorously?' is the definition.
(fighting a campaign)
'exceptional man with great hope' is the wordplay.
'exceptional' indicates an anagram.
'with' says to put letters next to each other.
'man'+'great'+'hope'='mangreathope'
'mangreathope' is an anagram of 'ON THE RAMPAGE'.
(Other definitions for on the rampage that I've seen before include "Storming about, behaving violently" , "Storming about, behaving wildly" .)