show (your) hand

to tell people your plans or ideas, especially if you were keeping them secret before.

I'm a bit reluctant to show my hand at this stage in the proceedings.

• take the ball and run with it
• take the bit between teeth
• take the bit between your teeth
• take the brunt of
• take the brunt of something
• take the bull by the horns
• take the cake
• take the cloth
• take the edge off
• take the edge off something
• take the fall
• take the fall for
• take the fall for someone
• take the fall for something
• take the fifth
• take the fifth amendment
• take the flak
• take the gloves off
• take the heat off
• take the heat off someone
• take the initiative
• take their toll
• take the law into own hands
• take the law into your own hands
• take the liberty of