From Longman Dictionary of Contemporary Englishunder a cloud (of suspicion)under a cloud (of suspicion)informalSUSPECT if someone is under a cloud, people have a bad opinion of them because they think they have done something wrong He left the company under a cloud of suspicion. → cloud
Examples from the Corpus
under a cloud (of suspicion)• The sight of these two storming along under a cloud of canvas is enough to stir the blood of most landlubbers.• For all these reasons wooden aeroplanes are under a cloud at the moment.• He passes away under a cloud, inscrutable at heart, forgotten, unforgiven, and excessively romantic.• According to the researchers, the new cell actually works better under cloud cover than in full sunlight.• We argued about it, and when I left, I left under a cloud.• Decades of wallpaper peeling under clouds of dust.• Not only must they care for distressed and disturbed young people, but they must do so under a cloud.• Sometimes the pressure we were under clouded our judgment. 