Image witch improved for spells? (5,5)
I believe the answer is:
white magic
'spells?' is the definition.
'image witch improved' is the wordplay.
'improved' indicates an anagram.
'image'+'witch'='imagewitch'
'imagewitch' is an anagram of 'WHITE MAGIC'.
'for' acts as a link.
(Other definitions for white magic that I've seen before include "Sorcery invoking good spirits" , "Good spelling?" .)