to shed / to take off / to escape / to get away from
脱
=
兑
+
月
:
The moon (月) just had lots of cash exchanged at an exchange booth (兑) in front of the observatory (o1). Shortly afterwards the cashier finds that the moon's money is fake and grabs him to hold him up, but suddenly Tommy Turtle sheds off (脱) his moon suit and is able to escape (脱)