Crude arrangement made better (5)
I believe the answer is:
cured
'made better' is the definition.
(I've seen this before)
'crude arrangement' is the wordplay.
'arrangement' indicates an anagram.
'crude' is an anagram of 'CURED'.
(Other definitions for cured that I've seen before include "Made better or preserved" , "Mended" , "Preserved by drying, salting or smoking" , "Made healthy again" , "Healed - smoked" .)