Answer:

cns

Answer	Crossword Clue
CNS	Neurologist's focus, initially?
CNS	Neurologist's subj.
CNS	Neurology subj.

CNS	Brain and spinal cord (abbr.)
CNS	Brain, spinal cord, etc.
CNS	Brain and spinal cord: Abbr.
CNS	Neurologist's concern: Abbr.
CNS	Brain-spinal cord combo
CNS	Brain and spinal cord, initially
CNS	The brain and the spinal cord (abbr.)
CNS	Brain and spinal chord: Abbr.

CNS	Credit notes: Abbr.
CNS	Laws: Abbr.
CNS	Church codes: Abbr.
CNS	Church laws: Abbr.
CNS	Huge guns: Abbr.
CNS	Brain and spinal cord (Abbr.)