"clandestine about" is a correct and usable phrase in written English.
It means to be secretive or discreet about something. Example: The politician was known to be clandestine about his personal life, as he never spoke about his family or relationships in public.
There is nothing clandestine about a brewery.
There's nothing clandestine about it.
There was nothing clandestine about the scenes outside Calais, though.
He has not exactly been clandestine about it.
There was no reason for Arroyo to be clandestine about his approach.
But in a world where digital imaging dominates visual culture, there is something clandestine about the gesture.
These clandestine "talks about talks" had been the brainchild of Michael Young, an executive at the British mining company Consolidated Goldfields, who, with great personal bravery, put out feelers to both sides in South Africa.
Bowie struck lucky once again with a familiar figure, scoring his second Major Tom-themed No 1, and if Space Oddity concealed a clandestine metaphor about heroin addiction, then in 1980 we find Tom way down in the hole, "hitting an all-time low".
While we spend our days uncovering hidden fees and bogus bank charges, we were shocked to discover that some of the most clandestine facts about money were right there before our eyes.
The secret dealings between the American intelligence services and the SS in Switzerland made the Soviets paranoid about Dulles, and about clandestine contacts between Soviet operatives and the Americans, and served as a pretext for the onset of the Cold War.
The journey to Italy and the clandestine August weeks were about as much as the love affair amounted to.
