Large metal coin found outside a region of Paris (5,7)

'region of paris' is the definition.
(the Latin Quarter is an area of Paris)

'large metal coin found outside a' is the wordplay.
I cannot really understand how this works, but
'large' could be 'l' (eg in clothes sizes) and 'l' is found within the answer.
'metal' could be 'ti' (Ti is an example) and 'ti' is found within the answer.
'coin' could be 'quarter' (quarter is a kind of coin) and 'quarter' is present in the answer.
'a' could be 'an' and 'an' is located in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).