According to Porteous, [Clinton's] statement clearly envisages the use of clandestine methods to obtain this intelligence where "overt collection... from open sources is inadequate".

These "philosophical" works were printed in Switzerland and brought into France by a host of clandestine methods.

But that profit was funneled through a complicated and wholly clandestine method directly into Kam Sang.

Its frequently overzealous and clandestine methods often hindered rather than helped the Church in its combat with Modernism.

As police sleuths grew more efficient, so the criminals became more sophisticated, employing clandestine methods to commit complex insurance frauds.

Illegal operators usually employ clandestine and international methods in order to disguise their activities.

If you want to develop a team of extra-special bodyguards, why use such clandestine methods?

Their competition included such clandestine methods as stealing acts from each other and committing various forms of sabotage.

Their stealth and clandestine methods of operation allow them to conduct multiple missions against targets that larger forces cannot approach undetected.

Their approach was much more open and popular than the clandestine methods which the Order of Memphis had preserved from earlier generations.