Second movement (6,3)
I believe the answer is:
number two
This clue could be a double definition.
'second' is the first definition.
(I've seen this before)
'movement' is the second definition.
Both the answer and definition are singular nouns.
Perhaps there's a link between them I don't understand?
Can you help me to learn more?
(Other definitions for number two that I've seen before include "Second-in-command" , "Assistant" , "Second in command" , "vice" , "deputy" .)