Expert as in ace in the hole A hidden advantage or resource kept in reserve for later use or a crucial moment. Clear All
2 Example Sentences Showcasing the Meaning of 'Ace In The Hole'
In the world of espionage, having a reliable informant can be an agent's ace in the hole for gathering critical intelligence.
The spy always carried a concealed gadget, his ace in the hole for escaping tricky situations during covert missions.
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