Crossword Genius

Country dropped a point in its old money (5)

Ross

I believe the answer is:

franc

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

'old money' is the definition.
(I've seen this before)

'country dropped a point in its' is the wordplay.
I cannot really understand how this works, but
'a' could be 'an' and 'an' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for franc that I've seen before include "Swiss coin" , "Nonsense (colloq.)" , "Swiss loot" , "Former European currency" , "Foreign capital" .)

I've seen this clue in The Globe and Mail.
Want a hint initially instead of a full solution? Install my app