Go red when completely level (5)
I believe the answer is:
flush
This clue could be a double definition.
'go red' is the first definition.
(I've seen this before)
'completely level' is the second definition.
'flush' can be an answer for 'level' (I've seen this before). I'm unsure of the 'completely' bit.
'when' is the link.
Can you help me to learn more?
(Other definitions for flush that I've seen before include "Rich" , "Become red and hot" , "Rouse game and put to flight" , "Rush of blood" , "Go red" .)