### Clue: Come to judge brute briefly infiltrating our chaps in action (6,6)
### Answer: HABEAS CORPUS 
 ### Explanation: Definition: Come to judge
 "beast"(a brute) **minus its last letter**(briefly) **contained in**(infiltrating) **anagram of**(… in action) OUR CHAPS.
Defn: An order requiring a person to be brought before a judge;come to judge, especially to determine whether his/her detention is lawful.