have an ace up someone's sleeve

Helicobacter pylori eradication: do we have another ace up our sleeve?
An ace up their sleeve: a transcriptomic approach exposes the AceI efflux protein of Acinetobacter baumannii and reveals the drug effl...
ACE2; an ACE up the Sleeve?
An ACE Up Your Sleeve
An unusual ST-segment elevation: apical hypertrophic cardiomyopathy shows the ace up its sleeve
Rare earths an ace up Alkane's sleeve
An ace up their sleeve
An Ace Up Your Sleeve
An Ace Up Your Sleeve
THE ACE UP BJP'S SLEEVE