(Too long for a comment.)
According to the Chicago Manual of Style, 16th ed., § 15.52:
"Quoted in" in author-date references. If an original source is
unavailable, and "quoted in" must be resorted to, mention the original
author and date in the text, and cite the secondary source in the
reference list entry. The text citation would include the words
Costello, Bonnie. 1981. Marianne Moore: Imaginary Possessions.
Cambridge, MA: Harvard University Press.
In Louis Zukofsky's "Sincerity and Objectification," from the February 1931 issue
of Poetry magazine (quoted in Costello 1981) ...
This is based on the policy that quotations must be scrupulously checked and verified (and that authors need to be honest about how they have accessed their sources). See, e.g.,
Checking quotations. All quoted matter should be checked against the original source, for both content and citation, before a manuscript is submit
ted for publication. This authorial task is crucial because manuscript ed
itors will not have access to all the sources that the author has used.
An author who appears to have been careless
in transcribing should be asked to check all quotations for accuracy, including punctuation. The editor should ensure that sources are given for
all quoted material, whether following the quotation or in a note. In editing previously published material, especially if it has been abridged, the
editor should read for sense to ensure that nothing is out of order or has
been inadvertently omitted. Discrepancies should be queried.
Ensuring accuracy of quotations. It is impossible to overemphasize the importance of meticulous accuracy in quoting from the works of others.
Authors should check every direct quotation against the original or, if
the original is unavailable, against a careful transcription of the passage.
That said, when you have access to the actual article, I believe the right and useful thing to do is to provide a title based on the incipit of the article. This will allow others to track down the source (more easily) if they so desire -- which is the reason for giving a citation in the first place.
Addendum As @moewe has pointed out, the author of the
biblatex-chicago package notes some further general difficulties regarding citing newspaper articles (see § 4.1, s.v. 'article'). Regarding “unsigned newspaper articles or features” (CMS § 14.207), the guide itself makes two suggestions: (1) that they are "best dealt with in the text or notes" -- i.e., don't include them in the bibliography; or (2), when an entry is needed, use the name of the newspaper as the author. The
biblatex-chicago documentation makes a few other suggestions; none, however, deal with the difficult case of an article that lacks both title and author.