I'm a little further with this:
event manager applet clear-cellular-NAT
description if gi0/0/0 is up clear NAT Translations for Cell0/0/0
event track 2 state up
****condition here to check state 2 periodically*** ?????
action 1.0 syslog msg "EEM detected gi0/0/0 up"
action 1.5 cli command "en"
action 2.0 cli command "conf t"
action 2.5 cli command "int cellular0/0/0”
action 3.0 cli command "shut”
action 4.0 cli command "no shut"
action 4.5 cli command "exit"
action 5.0 cli command “clear ip nat translation ????