Peers off on small binges (6)
I believe the answer is:
sprees
'binges' is the definition.
(I've seen this before)
'peers off on small' is the wordplay.
'off' indicates anagramming the letters.
'on' means one lot of letters go next to another.
'small' becomes 's' (abbreviation - e.g. clothes size).
'peers' is an anagram of 'spree'.
'spree'+'s'='SPREES'
(Other definitions for sprees that I've seen before include "Periods of fun, extravagance or excess" , "Binges" , "Brief flings, in the shops, say" , "Brief indulgences, flings" , "Flings indulging impulses, shopping say" .)