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Recent developments in the Standard Model analysis of semileptoniccharged-current processes involving light quarks have revealed $\sim 3\sigma$tensions in Cabibbo universality tests involving meson, neutron, and nuclearbeta decays. In this paper, we explore beyond the Standard Model explanationsof this so-called Cabibbo Angle Anomaly in the framework of the Standard ModelEffective Field Theory (SMEFT), including not only low-energy charged currentprocesses (`L'), but also electroweak precision observables (`EW') andDrell-Yan collider processes (`C') that probe the same underlying physicsacross a broad range of energy scales. The resulting `CLEW' framework not onlyallows one to test explanations of the Cabibbo Angle Anomaly, but is set up toprovide near model-independent analyses with minimal assumptions on the flavorstructure of the SMEFT operators. Besides the global analysis, we consider alarge number of simpler scenarios, each with a subset of SMEFT operators, andinvestigate how much they improve upon the Standard Model fit. We find that themost favored scenarios, as judged by the Akaike Information Criterion, arethose that involve right-handed charged currents. Additional interactions,namely oblique operators, terms modifying the Fermi constant, and operatorsinvolving right-handed neutral currents, play a role if the CDF determinationof the $W$ mass is included in the analysis.

Anomalies in global SMEFT analyses: a case study of first-row CKM unitarity