Perfect, thanks both of you!
In case someone has the same question, I used:
Is animation Attack1 playing
AND Player is (not) overlapping Enemy : Set enemy animation to "Missed"
AND Animation frame > 3
I had to add the 3rd condition or else the Attack1 animation would begin and immediately see it's not overlapping, and switch to "Missed" animation.
The 3rd condition ensures it has time to begin and get into attacking range!
Thanks again, guys! (Is there a way to flag/reward someone who had a helpful reply? I need to look into etiquette!)