Turn red, almost, with all that blood (4)
I believe the answer is:
gore
'that blood' is the definition.
(gore means blood or violence)
'turn red almost' is the wordplay.
'turn' becomes 'go' (a person's move in a board game).
'almost' means to remove the last letter (most of the word but not all of it).
'red' with its final letter taken away is 're'.
'go'+'re'='GORE'
'with all' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for gore that I've seen before include "Pierce with horn - blood" , "Blood on a piece let into a garment?" , "Coagulated blood from a wound" , "Blood; stab with tusk" , "Spilt blood" .)