Short time I'd arranged with ailing artist (10)
I believe the answer is:
modigliani
'artist' is the definition.
(I've seen this before)
'short time i'd arranged with ailing' is the wordplay.
'short time' becomes 'mo' (slang abbreviation for 'moment').
'arranged with' is an anagram indicator.
'id' mixed up with 'ailing' can make 'digliani'.
'mo'+'digliani'='MODIGLIANI'
(Other definitions for modigliani that I've seen before include "painter" , "artist" .)