Killing time (7,6)

I believe the answer is:

hunting season

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'killing time' is the definition.
The definition and answer can be both related to time as well as being singular nouns.
Perhaps you can see a link between them that I can't see?

'killing time' is the wordplay.
'killing' becomes 'hunting' (I can't justify this - if you can you should believe this answer much more).
'time' becomes 'season' (a season is a period of time).
'hunting'+'season'='HUNTING SEASON'

Can you help me to learn more?

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

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