Coat seen misshaped by a wallet (8)
I believe the answer is:
notecase
'a wallet' is the definition.
('notecase' can be a synonym of 'wallet')
'coat seen misshaped' is the wordplay.
'misshaped' is an anagram indicator.
'coat'+'seen'='coatseen'
'coatseen' is an anagram of 'NOTECASE'.
'by' is the link.
(Other definitions for notecase that I've seen before include "Container for paper money" , "used to carry money" , "carrier of cash" , "Wallet for folding money" , "Wallet for paper money" .)