About even and supporter shows wit (8)
I believe the answer is:
repartee
'wit' is the definition.
(repartee is a kind of wit)
'about even and supporter' is the wordplay.
'about' shows that the letters should be reversed in order.
'even' becomes 'raper' (I can't explain this - if you can you should believe this answer much more).
'and' is a charade indicator (letters next to each other).
'supporter' becomes 'tee' (I've seen this in other clues).
'raper' backwards is 'repar'.
'repar'+'tee'='REPARTEE'
'shows' acts as a link.
Can you help me to learn more?
(Other definitions for repartee that I've seen before include "Quick witty replies" , "Witty exchange" , "Smart retorts or witty replies" , "Series of clever replies" , "Witty banter" .)