suburbs or outskirts / one of the five degrees of official mourning attire in dynastic China / official in charge of fields (old)
甸
=
勹
+
田
:
The ants have set up a toy suburb (甸) in the anthill's bathroom (an4), including a field (田). It's Dorothy Gale's (di) job to till the field (田) riding on top of an elephant (勹) every day.
