Pay attention to what the Spectator does (5)
I believe the answer is:
watch
I believe this is a double definition.
'pay attention to' is the first definition.
'what the spectator does' is the second definition.
(Other definitions for watch that I've seen before include "Vigil" , "See 21" , "Observe - guard" , "Look at attentively" , "Keep under observation" .)