Lures into trouble and one's lad is ruined (5,2)
I believe the answer is:
leads on
'lures' is the definition.
(leading on is a kind of luring)
'one's lad is ruined' is the wordplay.
'is ruined' indicates an anagram.
'ones'+'lad'='oneslad'
'oneslad' with letters rearranged gives 'LEADS ON'.
'into trouble and' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for leads on that I've seen before include "Lures (into trouble)" , "How unruly dogs need to be taken" , "regularly taking tricks" .)