Foreign capital in candid report (5)
I believe the answer is:
franc
'foreign capital' is the definition.
(I've seen this before)
'candid report' is the wordplay.
'candid' becomes 'frank' (synonyms).
'report' shows a homophone (sound like) (as heard, or reported by someone).
'frank' is a homophone of 'FRANC'.
'in' is the link.
(Other definitions for franc that I've seen before include "Swiss capital" , "Historic currency" , "It's equal to 100 centimes" , "Swiss monetary unit" , "Nonsense (colloq.)" .)