Rather strange how Humpty Dumpty ended up? (3,3,4)
I believe the answer is:
off the wall
I believe this clue is a double definition.
'rather strange' is the first definition.
(off the wall means strange or unusual)
'how humpty dumpty ended up?' is the second definition.
(I've seen this before)
(Other definitions for off the wall that I've seen before include "Grossly unconventional" , "description of peeling plaster?" , "Left field" , "how Humpty Dumpty ended up" , "Peeling wallpaper" .)