Not whacked for winning? (8)
I believe the answer is:
unbeaten
'winning?' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?
'not whacked' is the wordplay.
'not' becomes 'un' (prefix meaning 'not').
'whacked' becomes 'beaten' (I can't justify this - if you can you should believe this answer much more).
'un'+'beaten'='UNBEATEN'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for unbeaten that I've seen before include "Never having lost" , "Not yet defeated" , "Undefeated" , "Never defeated" , "Not conquered" .)