  Hund's coupling in multiorbital systems allows for the possibility of
even-parity orbital-antisymmetric spin-triplet pairing, which can be stabilized
by spin-orbit coupling (SOC). While this pairing expressed in the orbital basis
is uniform and spin-triplet, it appears in the band basis as a
pseudospin-singlet, with the momentum dependence determined by the SOC and the
underlying triplet character remaining in the form of interband pairing active
away from the Fermi energy. Here, we examine the role of momentum-dependent SOC
in generating nontrivial pairing symmetries, as well as the hidden triplet
nature associated with this interorbital pairing, which we dub a "shadowed
triplet". Applying this concept to Sr$_{2}$RuO$_{4}$, we first derive several
forms of SOC with $d$-wave form factors from a microscopic model, and
subsequently we show that for a range of SOC parameters, a pairing state with
$s+id_{xy}$ symmetry can be stabilized. Such a pairing state is distinct from
pure spin-singlet and -triplet pairings due to its unique character of
pseudospin-energy locking. We discuss experimental probes to differentiate the
shadowed triplet pairing from conventional pseudospin-triplet and -singlet
pairings.
