What actor must follow Bond’s tech wizard, reportedly (3)
I believe the answer is:
cue
If this is the answer I cannot explain how the clue works.
Can you help me to learn more?
(Other definitions for cue that I've seen before include "State of collapse, disaster" , "Prompt; signal" , "Signal for action" , "Signal to players" , "Hint for a snooker or billiards striker" .)