  The determination of $|V_{cb}|$ using inclusive and exclusive (semi-)leptonic
decays exhibits a long-standing tension of varying ${\cal O}(3 \sigma)$
significance. For the inclusive determination the decay rate is expanded in
$1/m_b$ using heavy quark expansion, and from moments of physical observables
the higher order heavy quark parameters are extracted from experimental data in
order to assess $|V_{cb}|$ from the normalisation. The drawbacks are high
correlations both theoretically as well as experimentally among these
observables. We will scrutinise the inclusive determination in order to add a
new and less correlated observable. This observable is related to the decay
angle of the charged lepton and can help to constrain the important heavy quark
parameters in a new way. It may validate the current seemingly stable
extraction of $|V_{cb}|$ from inclusive decays or hints to possible issues, and
even may be sensitive to New Physics operators.
