Is highly moving in theatre part (5)
I believe the answer is:
flies
'is' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot understand how they can define each other.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for flies that I've seen before include "Insects; goes quickly" , "Insects; passes swiftly" , "Trouser zip area -- travels through the air" .)