The phrase "a swoop of a" is not standard in written English and may be considered awkward or unclear.
It could be used in a creative context, perhaps to describe a sudden or dramatic action, but it would need additional context to clarify its meaning.
Example: "With a swoop of a hand, she dismissed all doubts and fears."
Alternatives: "a sweep of" or "a flash of".
Drew darts skeptical glances from beneath a swoop of hair that accents a charismatic oddity.
Like the fictional Peck, Snowden had a youthful face, a swoop of brown hair, and an idealistic streak that seemed at odds with his job at a spy agency.
He has a swoop of yellow hair and wore a black T-shirt with a galaxy on it.
It should be worn with clear skin, a swoop of nude eye shadow, a couple of swipes of mascara and not much else.
In other incarnations of inner and outer wear, a fluffy sweater came with a slip of a skirt and a velvet dress had a swoop of neckline.
One of the reliable pleasures of New Directors/New Films is that at one point in this annual festival — or, if it's a good year, five or more points — a director will light up the screen with an unexpected burst of beauty, a swoop of the camera, a moment of grace.
Jack Handey is a solidly built man of 64 with a swoop of graying hair; when he smiles, his teeth are blindingly white.
(The reporter studies a photo of the doorstop, e-mailed to her by Ms. Hayes, which looks like a swoop of melted chocolate).
I'm going to be wearing a pop of "Bing" with a swoop of black liquid liner and a lush coat of Manic Panic Collection's "Creature of the Night" black mascara.
His Victor Frankenstein is a louche lad with a swoop of black new wave bangs, angular cheekbones, cropped leather jacket and matching trousers tucked into 18-eye Doc Marten-style boots and topped off with a skull and crossbones belt.
Detectives at the National Cyber Crime Unit were acting in concert with police from around the world in a swoop against a gang of suspected cybercriminals.
