Tails up maybe after this? (4)
I believe the answer is:
toss
'tails up maybe after this?' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for toss that I've seen before include "Raise a little money" , "Careless not to give this" , "Throw with a light motion" , "Leave decision to chance" , "'Flip, a coin or pancake say (4)'" .)