The proper method for doing, using, or handling something
Natural or acquired facility in a specific activity
An innate capability
I have a knack for spotting traitors.
She's also got a knack for weapons.
Her cousin can Travel and has a knack for weapons she's hiding from Jessi.
He was also a favorite with Darian's advisors and court, with a knack for connecting with everyone, even the servants.
"I have quite lost the knack of talking to ladies," he said.