Potters stick (3)
I believe the answer is:
cue
'stick' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for cue that I've seen before include "Prompt; reminder" , "Catchword" , "Snooker rod" , "signal to come on" , "Prompt; signal" .)