Light-headed person's name for a game (5)
I believe the answer is:
lotto
'game' is the definition.
(the UK National Lottery)
'light-headed person's name' is the wordplay.
'light headed person's' becomes 'l' (I can't explain this - if you can you should believe this answer much more).
'name' becomes 'otto' (Otto is an example).
'l'+'otto'='LOTTO'
'for a' acts as a link.
Can you help me to learn more?
(Other definitions for lotto that I've seen before include "Bingo - Venetian painter" , "Children's game; lottery" , "Children's game similar to bingo" , "Bingo-like game" , "Game of chance similar to bingo" .)