I can act it out, being one who plans the moves (9)
I believe the answer is:
tactician
'one who plans the moves' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'i can act it out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'i'+'can'+'act'+'it'='icanactit'
'icanactit' is an anagram of 'TACTICIAN'.
'being' is the link.
Can you help me to learn more?
(Other definitions for tactician that I've seen before include "One planning" , "Someone skilled in manoeuvres" , "director of operations" , "Skilful mover" , "Skilled planner" .)