Game bird caught in blurry photos (5-2-2)

I believe the answer is:

shoot-em-up

I'm a little stuck... Click here to teach me more about this clue!

'game' is the definition.
I know nothing about this answer so I can't tell whether this works.

'bird caught in blurry photos' is the wordplay.
I cannot quite see how this works, but
'bird' could be 'emu' (emu is a type of bird) and 'emu' is located in the answer.
an anagram of 'photos' is 'shootp' which is located in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Times.

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