Lay one’s cards on the table? Crossword Clue

 The answer to the crossword clue "Lay one’s cards on the table" is DISCLOSE. This is because the idiom "lay one's cards on the table" means to reveal one's intentions, to be honest, to bring things hidden out into the open. When someone lays his cards on the table he reveals his agenda, feelings, plans or intentions.

The word "disclose" means to reveal something that is secret or hidden. So, the answer "disclose" is a good fit for the clue because it means to reveal one's cards, which is a metaphor for revealing one's intentions.

Here are some other possible answers to the clue, although they are not as common:

REVEAL

CONFESS

ADMIT

OPEN UP

BE HONEST

I hope this helps! Let me know if you have any other questions.