A light show to start with? (5)
I believe the answer is:
pilot
'a light show' is the definition.
'pilot' can be an answer for 'show' (pilot is a kind of show). I am unsure of the 'a light' bit.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for pilot that I've seen before include "air traffic controller?" , "Plane driver" , "Navigator" , "One licensed to fly" , "Lead" .)