Shopaholic's indulgence (5)
I believe the answer is:
spree
'shopaholic's indulgence' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spree that I've seen before include "Drunken bout" , "Merry frolic" , "Beano" , "Jollification" , "Junket" .)