One between two boozers writing about savagery (9)
I believe the answer is:
barbarism
'savagery' is the definition.
(I know that savagery can be written as barbarism)
'one between two boozers writing' is the wordplay.
'two boozers' can mean two substitutions for 'boozer'.
'one' becomes 'I' (Roman numeral).
'between' means one lot of letters goes inside another.
'boozer' becomes 'bar'.
'boozer' becomes 'bar'.
'writing' becomes 'sm' (I am not sure about this - if you are sure you should believe this answer much more).
'bar'+'bar'+'sm'='barbarsm'
'i' placed inside 'barbarsm' is 'BARBARISM'.
'about' acts as a link.
Can you help me to learn more?
(Other definitions for barbarism that I've seen before include "Absence of culture and civilisation" , "Uncivilised nature" .)