Hunting season problem for the easily bored? (7,4)

I believe the answer is:

killing time

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'problem for the easily bored?' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'hunting season' is the wordplay.
'hunting' becomes 'killing' (I am not sure about this - if you are sure you should believe this answer much more).
'season' becomes 'time' (both can mean a period).
'killing'+'time'='KILLING TIME'

Can you help me to learn more?

(Other definitions for killing time that I've seen before include "Occupying oneself to pass hours" , "Finding idle amusement - perhaps" , "Filling in spare moments" , "Occupying oneself to avoid boredom" .)

I've seen this clue in The Globe and Mail.

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