Sorting tease is most uncomplicated (7)
I believe the answer is:
easiest
'most uncomplicated' is the definition.
('easy' can be similar in meaning to 'uncomplicated')
'sorting tease is' is the wordplay.
'sorting' indicates anagramming the letters.
'tease'+'is'='teaseis'
'teaseis' is an anagram of 'EASIEST'.
(Other definitions for easiest that I've seen before include "Most simple" , "Requiring the least amount of effort" , "Least hard" , "most relaxed" , "Least difficult" .)