Address mostly full of comic potential in epic style (7)
I believe the answer is:
homeric
'in epic style' is the definition.
(in a style reminiscent of Homer)
'address mostly full of comic potential' is the wordplay.
'address' becomes 'home' (home is a kind of address).
'mostly' means to remove the last letter.
'full of comic potential' becomes 'rich' (something 'a bit rich' is amusing or comical).
'rich' with its last letter taken off is 'ric'.
'home'+'ric'='HOMERIC'
(Other definitions for homeric that I've seen before include "of old poet" , "Like unrestrained laughter" , "Imposing" , "In style of, eg, the Iliad" , "Large-scale" .)