A pre-match fling (4)
I believe the answer is:
toss
'fling' is the definition.
(I know that fling can be written as toss)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for toss that I've seen before include "Flip up into the air - coin or salad" , "Raise a little money" , "Raise a bit of money before opening" , "decision-making process" , "Throw (coin) so as to choose" .)