Italian light seen on bonfire night (5,6)
I believe the answer is:
roman candle
'on bonfire night' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'italian light' is the wordplay.
'italian' becomes 'Roman' (someone from Rome).
'light' becomes 'candle' (candle is a kind of light).
'roman'+'candle'='ROMAN CANDLE'
'seen' acts as a link.
Can you help me to learn more?
(Other definitions for roman candle that I've seen before include "Firework projecting succession of coloured stars" , "Example of fireworks" , "Pyrotechnic device" , "Type of firework" , "Cylindrical firework" .)