The phrase "a rather subtle" is correct and usable in written English.
It can be used to describe something that is not immediately obvious or is delicately nuanced.
Example: "The artist's use of color in the painting is a rather subtle way of conveying emotion."
Alternatives: "somewhat understated" or "fairly nuanced".
Your question has two answers: an elementary one and a rather subtle one.
The cross-border tensions on screens portrayed a rather subtle gender politics as well.
But until now, the statement knit has been a rather subtle fashion message.
By the way, again we use straight lines in a rather subtle way in something called interpolation.
While mimicking behaviors can be effective, it is still a rather subtle strategy that leaves the potential for emotional ambiguity.
This knowledge has caused a rather subtle but remarkable change in some of Ashe's attitudes during recent months.
The final two are Absolutely Anything, the Terry Jones comedy in which he voices Simon Pegg's dog, Dennis, and a rather subtler proposition: a drama called Boulevard, which premiered to warm reviews at Tribeca in April.
But beyond the blood, brine and slime that swills down the Ratcliffe Highway, above the stench of the rotting fruit and vegetables and the excrement of a thousand animals, lies a rather subtler story of the hazy line between camaraderie and rivalry and of the bonds both forged and broken in extreme adversity.
And that is a third, rather subtle component of the anti-American tide.
However, a thin, rather subtle and homogeneous rim enhancement with absent enhancement of the lesion centre hints at inflammatory conditions, such as cysts, liponecrosis, and abscess (B, upper row, left upper lesion).
On closer inspection however, it becomes clear that Hoxha is engaged in something rather subtle: a double hagiography, slyly promoting his own personality cult alongside his hero.
