  Strongly correlated system with competing ground states are often poised
close to the quantum critical point. External perturbations such as pressure,
strain, electric field, and chemical doping can stabilise its ground state with
exotic physical properties. Cr-doping is the lone exception which enhances the
Curie-temperature in one of such correlated system SrRuO$_3$. To find the
origin of $T_C$ enhancement, we investigate temperature-dependent structure,
spectroscopic, magnetic and magnetotransport properties in
SrRu$_{1-x}$Cr$_x$O$_3$. Cr-doping squeezes the unit cell volume which
effectively enhances the stretching octahedral distortion by nearly five times
than pure SrRuO$_3$. The Curie temperature increment by $\sim$ 22 K for x =
0.15 is found to be intertwined with the structural-modulation.
Temperature-dependent Neutron diffraction analysis indicate that the unit cell
volume minima coincide exactly with the enhanced ferromagnetic ordering ($\sim$
190 K). Further analysis reveals that the effect of Cr-doping not only freezes
the octahedral tilt below 100 K but also suppresses the complex magnetism
responsible for exchange bias and topological hall effect in SrRuO$_3$. The
spectroscopic measurements find a reduction of itinerancy of d-electrons with
Cr-doping. The magnetotransport measurements portray an evolution from
itinerant to localised ferromagnetism.
