Person takes care of it and arranges a discount (9)
I believe the answer is:
custodian
'person' is the definition.
(custodian is a kind of person)
'arranges a discount' is the wordplay.
'arranges' is an anagram indicator (I've seen 'arrange' mean this).
'a'+'discount'='adiscount'
'adiscount' with letters rearranged gives 'CUSTODIAN'.
'takes care of it and' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for custodian that I've seen before include "Protector/guardian (of something)" , "museum keeper" , "One takes care of" , "Guardian" , "Protector" .)