Usurer needing pounds has krona converted (4,5)
I believe the answer is:
loan shark
'usurer' is the definition.
(synonyms)
'pounds has krona converted' is the wordplay.
'pounds' becomes 'L' (L can represent the monetary pound).
'converted' indicates anagramming the letters.
'has'+'krona'='haskrona'
'haskrona' anagrammed gives 'oanshark'.
'l'+'oanshark'='LOAN SHARK'
'needing' acts as a link.
(Other definitions for loan shark that I've seen before include "Usurer" , "One lends money at excessive rates of interest" , "Money lender" , "Financial dealer" , "Unscrupulous moneylender (colloq.)" .)