Other pal made up excess (8)
I believe the answer is:
plethora
'excess' is the definition.
(plethora is a kind of excess)
'other pal made up' is the wordplay.
'made up' is an anagram indicator.
'other'+'pal'='otherpal'
'otherpal' with letters rearranged gives 'PLETHORA'.
(Other definitions for plethora that I've seen before include "Unnecessarily large quantity" , "Surfeit" , "Over-fullness, excess" , "almost too much" , "Abundance" .)