Shopping binge (5)
I believe the answer is:
spree
'shopping binge' 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 "Period of extravagance or excess" , "Unrestrained bout" , "Unrestrained time" , "Merry frolic" , "Splurge" .)