People may take steps to paint it (7)
I believe the answer is:
ceiling
'it' is the definition.
The definition suggests a singular noun which matches the answer.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for ceiling that I've seen before include "upper limit on wages" , "Room's upper surface" , "Overhead surface" , "likely to get plastered" .)