The phrase "a bit of a shadow" is correct and usable in written English.
It can be used to describe something or someone that is somewhat overshadowed or less prominent compared to others.
Example: "In the group photo, she felt like a bit of a shadow next to her more outgoing friends."
Alternatives: "somewhat overshadowed" or "a little less prominent."
"That public posture is a bit of a shadow play," said Shuja Nawaz, an analyst and director of the South Asia Center at the Atlantic Council in Washington.
"I'm just in complete disbelief at how rude and arrogant they have been - it's left a bit of a shadow over the whole occasion," she added.
The mermaid, Dr. Kendall explained, is probably a bit of a shadow and a bit of a story: although sailors sometimes mistook manatees for mermaids, they also may represent "sailors' fears of women in foreign ports".
To go out of the Champions League at this [group] stage casts a bit of a shadow over Old Trafford because nobody expected it.
Dubious ICOs, scaling issues and hacks have cast a bit of a shadow, but the reality is dozens of stunning blockchain implementations and trials are moving ahead in many business domains, from major banks, to big logistics and technology companies, to fast-emerging startups.
But the rigor with which Lucasfilm has reset the gauges and cleared the stage casts a bit of a shadow over the games that will form part of the canon, amongst them the unannounced titles in development at two further EA-associated studios, Mass Effect HQ BioWare and Battlefield Hardline makers Visceral.
The audience was mostly elderly and almost entirely white, and for a while seemed to cast a bit of a cautioning shadow over the talk from the stage.
"She always had a bit of a sad shadow following her around". "Non-uniform day.
Wood was part of a delegation of "Rings" actors who visited the sets in Australia where George Lucas was making his latest series, back when the "Rings" crew felt "like a bit of a rogue group" in the shadow of that sci-fi franchise.
Which made last week's Shadow Cabinet reshuffle a bit of a puzzle.
The drawing begins in tentative pencil on blue paper; over the pencil, black ink, doing equally well for shadows and mascara; the lips done in red, the hair virulent green, a bit of scribbly shadow in blue ballpoint, here and there nasty patches of salmony flesh colour, all enlivened with what looks like typewriter correcting fluid, which gives the woman's face an unpleasant shininess.
