  In this paper, we study weakly classical 1-absorbing prime submodules of a
nonzero unital module $M$ over a commutative ring $R$ having a nonzero
identity. A proper submodule $N$ of $M$ is said to be a weakly classical
1-absorbing prime submodule, if for each $m\in M$ and nonunits $a,b,c\in R,$
$0\neq abcm\in N$ implies that $abm\in N$ or $cm\in N$. We give various
examples and properties of weakly classical 1-absorbing prime submodules. Also,
we investiage the weakly classical 1-absorbing prime submodules of tensor
product $F\otimes M$ of a (faithfully) flat $R$-module $F$ and any $R$-module
$M.$ Also, we prove that if every proper submodule of an $R$-module $M$ is
weakly classical 1-absorbing prime, then $Jac(R)^{3}M=0$. In terms of this
result, we characterize modules over local rings in which every proper
submodule is weakly classical 1-absorbing prime.
