Hothead to argue about an address (8)
I believe the answer is:
harangue
'address' is the definition.
(haranguing is a kind of addressing)
'hothead to argue about an' is the wordplay.
'hothead' becomes 'h' (head letter of 'hot').
'to' is a charade indicator (letters next to each other).
'about' is an insertion indicator.
'argue' placed around 'an' is 'arangue'.
'h'+'arangue'='HARANGUE'
(Other definitions for harangue that I've seen before include "'Loud, long diatribe (8)'" , "Lecture aggressively" , "A lengthy earnest speech" , "Tirade, diatribe" , "Exhortation" .)