Despite miserliness, purchases record (7)
I believe the answer is:
itemise
'record' is the definition.
('record'->'itemize' is in my internal thesaurus and 'ize'->'ise')
'despite miserliness purchases' is the wordplay.
'purchases' indicates the answer is hidden within the clue (I've seen 'purchasing' mean this).
'ITEMISE' can be found hidden inside 'despite miserliness'.
(Other definitions for itemise that I've seen before include "List out singly" , "List each thing separately" , "Set down separately" , "specific" , "catalogue" .)