Begin to arrange a spree (5)
I believe the answer is:
binge
'a spree' is the definition.
(I've seen this before)
'begin to arrange' is the wordplay.
'to arrange' indicates anagramming the letters.
'begin' is an anagram of 'BINGE'.
(Other definitions for binge that I've seen before include "Drunken spree" , "Bout of indulgence" , "Bust" , "Indulgent spree" , "Bender" .)