Belief or trust (6)
I believe the answer is:
credit
I believe this is a double definition.
'belief' is the first definition.
(thesaurus)
'trust' is the second definition.
(I know that credit is a more specific form of the action the trust)
(Other definitions for credit that I've seen before include "Acknowledgement of a contributor" , "Acknowledgment, recognition or praise" , "Believe, tick" , "Due recognition for kind of loan?" , "Arrangement for deferred payments" .)