The phrase "a mood which" is correct and usable in written English.
It can be used to describe a specific emotional state or atmosphere that is being referenced or elaborated upon.
Example: "The novel captures a mood which reflects the protagonist's inner turmoil and struggles."
Alternatives: "an atmosphere that" or "a feeling that".
A talkback caller mooted a mood which is prevalent among many Tasmanians.
Yet the action felt listless, a mood which extended to the orchestra, conducted by Evelino Pidò.
It quickly summons a mood, which turned out to be the mood of the country months after the song was released.
Band member Steven Drozd's substance abuse battles and Coyne's split with his partner after 25 years have influenced a mood which the singer describes as "embracing hopelessness".
It is a mood which combines relief that the war is over, enduring unease about the individual sacrifices – and latent scepticism about the entire wisdom, conduct and effectiveness of the conflict.
Popular rap has morphed into something else, hung with emotion and responsibility, less macho and more in touch with the current mood, a mood which doesn't quite chime with what Lil Wayne represents.
That confrontational stance was abandoned during a lone ballad, Duke Ellington's "In a Sentimental Mood," which he played from a seated position, like Dexter Gordon in his twilight years.
But Obama was seeking to create a new mood, which is a prerequisite to progress.
But at least he was in a joking mood, which was also an improvement.
Additionally, breaks help you stay in a good mood, which can be an essential component of staying effective at your job, especially if you work face-to-face with customers.
This effect possibly relates to the extension of the spatial scope of attention in a positive mood, which is accompanied by a simultaneous decrease in sensitivity to negative signals.
