Finds lures undone (5)
I believe the answer is:
rules
'finds' is the definition.
('rule' can be a synonym of 'find')
'lures undone' is the wordplay.
'undone' indicates anagramming the letters.
'lures' is an anagram of 'RULES'.
(Other definitions for rules that I've seen before include "governments" , "Governs; regulations" , "instructions" , "See 7" , "Laws; draws lines" .)