Not reactive or interactive (5)
I believe the answer is:
inert
'not reactive' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for inert that I've seen before include "Lifeless or static" , "Disinclined to move" , "Dormant, lifeless" , "Slow and apathetic" , "Unreactive; still" .)