Investigate leper dancing with ox (7)
I believe the answer is:
explore
'investigate' is the definition.
(exploring is a kind of investigating)
'leper dancing with ox' is the wordplay.
'dancing with' is an anagram indicator.
'leper' mixed up with 'ox' can make 'EXPLORE'.
(Other definitions for explore that I've seen before include "Travel through region to learn about it" , "Evaluate (possibility)" , "Look around; examine" , "Examine unknown territory" , "Travel in search of discovery" .)