Cried unhappily for a short time, we believe (6)
I believe the answer is:
credit
'believe' is the definition.
(I know that credit is a kind of the trust)
'cried unhappily for a short time we' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'cried' is 'credi' which is located in the answer.
'time' could be 't' (abbreviation) and 't' is found within the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for credit that I've seen before include "Time to pay, or due recognition" , "Source of pride; account entry" , "Acknowledgement given for deed or quality" , "Believe; account entry" , "Tick - distinction" .)