Game of chance - fate as well? Not entirely (5)
I believe the answer is:
lotto
'game of chance' is the definition.
(I've seen this before)
'fate as well? not entirely' is the wordplay.
'fate' becomes 'lot' ('lot' can be a synonym of 'fate').
'as well?' becomes 'too' ('too' can be a synonym of 'as well').
'not entirely' means to remove the last letter.
'too' with its last letter taken off is 'to'.
'lot'+'to'='LOTTO'
(Other definitions for lotto that I've seen before include "Bingo - Venetian painter" , "Game of chance similar to bingo" , "Game of chance based on numbered balls being drawn at random" , "house" , "Lucky draw" .)