Latin army chuck out a horse-shoe? (5,5)

I believe the answer is:

lucky charm

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

'a horse-shoe?' is the definition.
I know nothing about this answer so I can't tell whether this works.

'latin army chuck out' is the wordplay.
'latin' becomes 'l'.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'army'+'chuck'='armychuck'
'armychuck' with letters rearranged gives 'uckycharm'.
'l'+'uckycharm'='LUCKY CHARM'

Can you help me to learn more?

(Other definitions for lucky charm that I've seen before include "Rabbit's foot, for example" , "Talisman" .)

I've seen this clue in the Sydney Morning Herald.

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