  In this paper we present spin-to-charge current conversion properties in the
Weyl semimetal TaP by means of the inverse Rashba-Edelstein effect (IREE) with
the integration of this quantum material with the ferromagnetic metal Permalloy
$(Py=Ni_{81}Fe_{19})$. The spin currents are generated in the Py layer by the
spin pumping effect (SPE) from microwave-driven ferromagnetic resonance and are
detected by a dc voltage along the TaP crystal, at room temperature. We observe
a field-symmetric voltage signal without the contamination of asymmetrical
lines due to spin rectification effects observed in studies using metallic
ferromagnets. The observed voltage is attributed to spin-to-charge current
conversion based on the IREE, made possible by the spin-orbit coupling induced
intrinsically by the bulk band structure of Weyl semimetals. The measured IREE
coefficient ${\lambda}_{IREE}=(0.30 \pm{0.01})$ nm is two orders of magnitude
larger than in graphene and is comparable to or larger than the values reported
for some metallic interfaces and for several topological insulators.
