Game play outwardly involves chance (6)
I believe the answer is:
plucky
'game' is the definition.
(I've seen this before)
'play outwardly involves chance' is the wordplay.
'outwardly' suggests removing the centre (only the outermost letters are used).
'involves' is an insertion indicator.
'chance' becomes 'luck' (synonyms).
'play' with its middle removed is 'py'.
'py' going around 'luck' is 'PLUCKY'.
(Other definitions for plucky that I've seen before include "Feisty, gutsy" , "Doughty" , "Determined, courageous" , "Brave in English way" , "stout" .)