Poker table giveaway (4)
I believe the answer is:
tell
'poker table giveaway' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tell that I've seen before include "Make a difference" , "Notify" , "Legendary Swiss crossbowman and folk hero" , "Inform - count - Swiss hero" , "his hitting the apple?" .)