Extraordinary to pleb, winning game (6,7)
I believe the answer is:
tenpin bowling
'game' is the definition.
(tenpin bowling is a kind of game)
'extraordinary to pleb winning' is the wordplay.
'extraordinary' is an anagram indicator.
'to'+'pleb'+'winning'='toplebwinning'
'toplebwinning' anagrammed gives 'TENPIN BOWLING'.
(Other definitions for tenpin bowling that I've seen before include "Game played in lanes in alleys" , "Indoor game like skittles" , "Skittle game" , "Game played in an alley" .)