Tied up credit we hear (7)
I believe the answer is:
trussed
'tied up' is the definition.
('truss' can be a synonym of 'tie up')
'credit we hear' is the wordplay.
'credit' becomes 'trust' (trust is a kind of credit).
'we hear' shows a homophone (sound like).
'trust' sounds like 'TRUSSED'.
(Other definitions for trussed that I've seen before include "Bundled up" , "Secured" , "Tied up" , "Dusters (anag) - bound" , "Bound up tightly" .)