Sentence examples similar to a covert cluster from inspiring English sources

My children kindly indulged me as I imparting my bits of knowledge in the hope that, if nothing else, I could convey something of the magic that can brew in a city's covert clusters, the backwaters of romance, difference and disrepute that the mainstream passes by.

(He is not a covert operative).

Not a covert touch.

Act like a covert revolutionary.

What's a covert channel?

How about a covert wedding?

It was an attempt at a covert operation.

"HIV is a covert issue, it is very hidden.

But in fact they acted as a covert hit squad.

I sent him a covert text message that went unanswered.

And Iran was concealing a covert nuclear facility.