Tradecraft
WordNet
noun
(1) Skill acquired through experience in a trade; often used to discuss skill in espionage
"Instructional designers are trained in something that might be called tradecraft"
"The CIA chief of station accepted responsibility for his agents' failures of tradecraft"
WiktionaryText
Noun
- the skills acquired through experience of a trade
- the methods used in espionage and clandestine operations