They were accused of 'spying' for a foreign government.
a 'spy' camera/plane [=a camera/plane used for spying]
a 'spy' novel/thriller [=a novel/thriller about spies]
(..) Anything on Nat? - This is sealed tight. - We're going to need to access the program, break it down from within. Any chance Natasha might leave you a message, outside the internet, old school spy stuff? There's some nets I can cast. Yeah, all right. I'll find her. Yeah, about that. No. (..)2015 Avengers: Age of Ultron