The phrase "in a cloak" is correct and usable in written English.
This phrase can be used to describe a person who is wearing a cloak. For example: "She went to the ball cloaked in her best velvet gown."
Wrapping our travels in a cloak of altruism hardly helps.
The Museo Guggenheim is a dream ship of undulating forms in a cloak of titanium.
And "Made-Up" similarly disguises its ambitions in a cloak of scruffy modesty.
"We nominated everyone, and then they turned on us as if in a cloak of darkness".
Seeking absolute victory, wrapped in a cloak of righteous principle, is not working.
Tony Blair was in messianic mode, clad in a cloak of infallibility.
How about we cover ourselves in a cloak to stop the catcalling?
Mr. Suharto tried to wrap his dealings in a cloak of legitimacy.
The president himself envelops his golf game in a cloak of secrecy.
The Silver Fox came out fighting dirty, draping his diss in a cloak of chivalry: "Let's be candid about this.
Obviously I understand that couching a request for (basic) respect in a cloak of civility can be politic.
