Become angry when they don't win card game (4,8)
I believe the answer is:
lose patience
'become angry when they' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'don't win card game' is the wordplay.
'don't win' becomes 'lose' (I've seen this before).
'card game' becomes 'patience' (patience is a kind of card game).
'lose'+'patience'='LOSE PATIENCE'
Can you help me to learn more?
(Another definition for lose patience that I've seen is " become exasperated".)