Bout of indulgence (5)
I believe the answer is:
spree
'bout of indulgence' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for spree that I've seen before include "Spell of unrestrained activity" , "Unrestrained bout" , "running through the streets of Berlin?" , "Binge" , "Session of over-indulgence" .)