The phrase "a rather morose" is correct and usable in written English.
It can be used to describe someone or something that is gloomy or sullen in a somewhat understated manner.
Example: "After hearing the disappointing news, she wore a rather morose expression throughout the meeting."
Alternatives: "somewhat gloomy" or "fairly somber".
He also confesses to enjoying reading the obituaries, which in some people's eyes will probably fit the popular characterisation of Pearson as a rather morose man.
"We had a rather morose dinner," Whitemore recalls, "and he said, 'I don't think it'll work.' I said, 'I'll write a very rough, quick first draft,' which I did.
First came a firebrand teenager who called on us all to move our money from big banks to credit unions (and to take out the trash, please), and next, a rather morose older guy, unemployed, who didn't have much to say at all.
On the album, Ricky Jay performs Kemp's piece as a spoken-word poem at a rather morose pace, with atmospheric sound effects provided by Willner and several musicians.
Several video interviews have surfaced on YouTube showing an articulate, rather morose man with bad memories of active service in Chechnya.
It's true that they tend to be rather morose.
Wilson once wrote in his journal, after meeting with Straus, "I had been feeling hungover and rather morose, but as usual he made me laugh and cheered me up".
Standing around rather morosely — if a guy in a sheet can be said to be morose, and not, more accurately, motionless — C's ghost watches M devour an entire pie that has been left for her, as condolence food, by their real estate agent (Liz Cardenas Franke), and then he watches her vomit it all up.
As several critics have pointed out, the scene of the morose green giant leaping from one butte to another out West is a rather cheesily rendered effect, and this is a minor tragedy for Ang Lee.
If ever there was a mascot for 2015 Portland, it isn't Timber Joey, but rather their morose, scarf-draped coach Caleb Porter looking on from the sidelines.
After an accident a morose teacher, Anna Christina Riccii), ends up not quite dead on a mortuary slab.
