Vocally candid in old French capital? (5)
I believe the answer is:
franc
'old french capital?' is the definition.
'franc' can be an answer for 'capital?' (I have seen 'Swiss capital' mean 'franc' so perhaps 'capital' could also mean 'franc'). I am unsure of the 'old french' bit.
'vocally candid' is the wordplay.
'vocally' indicates a 'sounds like' (homophone) clue.
'candid' becomes 'frank' (synonyms).
'frank' is a homophone of 'FRANC'.
'in' is the link.
Can you help me to learn more?
(Other definitions for franc that I've seen before include "Swiss monetary unit" , "Unit of money" , "Former French monetary unit" , "Old French coin" , "Swiss capital" .)