Fool can pursue credit note (6)
I believe the answer is:
cretin
'fool' is the definition.
(I've seen this before)
'can pursue credit note' is the wordplay.
'can' becomes 'tin' (both are metal containers).
'pursue' is a charade indicator (letters next to each other).
'credit' becomes 'cr' (abbreviation).
'note' becomes 'e' (musical note).
'cr'+'e'='cre'
'tin' after 'cre' is 'CRETIN'.
(Other definitions for cretin that I've seen before include "Halfwit" , "soft" , "fool" , "Charlie" , "Idiot!" .)