Expert as in means A strategic advantage or hidden resource that is kept secret until it is needed. 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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