Outrageous penetrating look in past game (5)
I believe the answer is:
lotto
'past game' is the definition.
'lotto' can be an answer for 'game' (the UK National Lottery). I'm not sure about the 'past' bit.
'outrageous penetrating look' is the wordplay.
'outrageous' becomes 'OTT' (short for over the top).
'penetrating' indicates putting letters inside.
'look' becomes 'lo' (archaic exclamation meaning 'look!').
'ott' going inside 'lo' is 'LOTTO'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for lotto that I've seen before include "Housey-housey, bingo" , "house" , "National gambling game" , "Game of chance similar to bingo" , "Game in which numbers are drawn" .)