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