Belief in solvency? (6)
I believe the answer is:
credit
I believe this is a double definition.
'belief' is the first definition.
(thesaurus)
'solvency?' is the second definition.
(thesaurus)
'in' is the link.
(Other definitions for credit that I've seen before include "Acknowledgement given for deed or quality" , "Believe; acknowledgement" , "good grade" , "Believe the time to pay?" , "Believe the advance of money" .)