  We show, by means of dynamical mean-field theory calculations, that the
experimental fingerprints of the nematic order in iron-based superconductors
are intrinsically connected with the electronic correlations in the Hund's
correlated metallic state and they can not be accessed via a renormalized
quasiparticle picture. In particular, our results show that: (i) in a metal in
which correlations are dominated by the Hund's coupling the nematic ordering
does not produce a rigid energy shift in the photoemission spectra, but a much
richer spectral weight redistribution which mirrors the experimental results;
(ii) the nematic ordering is characterized by an orbital-selective coherence
induced by the Hund's physics in agreement with the experimental picture.
