It provides light close to where we live (4)
I believe the answer is:
star
'it' is the definition.
The definition suggests a singular noun which matches the answer.
'provides light close to where we live' is the wordplay.
'close to' indicates one should take the final letters (the close/ending of).
'where we live' becomes 'ar' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The final letters of 'provides light' are 'st'.
'st'+'ar'='STAR'
Can you help me to learn more?
(Other definitions for star that I've seen before include "Heavenly light" , "Major" , "Famous player" , "Top celebrity" , "Pointed symbol" .)