Source of light initially (3)
I believe the answer is:
sol
'source of light initially' is the definition.
I can't judge whether this defines the answer.
'source of light initially' is the wordplay.
'initially' says to take the initial letters.
The first letters of 'source of light' is 'SOL'.
Can you help me to learn more?
(Other definitions for sol that I've seen before include "Musical note" , "Note, old french coin" , "A Latin sun" , "The sun in Spain" , "The Sun (or Campbell?)" .)