Old man to understand about rupees and francs (11)
I believe the answer is:
grandfather
'old man' is the definition.
(I've seen this before)
'understand about rupees and francs' is the wordplay.
I cannot really understand how this works, but
'about' could be 'a' (abbreviation in Chambers) and 'a' is located in the answer.
'rupees' could be 'r' (abbreviation for rupees) and 'r' is present in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is present in the answer.
This explanation may well be incorrect...
'to' is the link.
Can you help me to learn more?
(Other definitions for grandfather that I've seen before include "Relative U clock" , "Older relative" , "An old-timer?" , "Old man" .)