__ One's Hand; to Be Mistakenly Optimistic

This page is the CodyCross answer for the clue below from Beach Bliss, Group 2053, Puzzle 5 (Bioluminescent).

Question is: __ One's Hand; to Be Mistakenly Optimistic

and the answer is: OVERPLAY

Word Meaning:

OVERPLAY — (ambitransitive, acting) To overdo or overact one's effect or role.

Definitions from Wiktionary.