### Clue: When twin has dropped in, visiting house, passing comment (4,5)
### Answer: LAST WORDS 
 ### Explanation: Definition: passing comment
 [AS(when, as in "as you walk into the room") + "twin" **minus**(has dropped) "in" ] **contained in**(visiting) LORDS(one of the two Houses of Parliament).
Defn: .., ie. on passing from this world.