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Let $f$ be a $SL(2,\mathbb{Z})$ holomorphic cusp form or the Eisenstienseries $E(z,1/2)$ and $\pi$ be a $SL(3,\mathbb{Z})$ Hecke-Maass cusp form withits Langlands parameter $\mu$ in generic position i.e. away from Weyl chamberwalls and away from self dual forms. We study an amplified second moment$\sum_{j} A(\pi_j)|L(1/2,\pi_j\times f)|^2$ and deduce the subconvexity bound\begin{equation*} L(1/2,\pi\times f)\ll_{f,\epsilon}\|\mu\|^{3/2-1/2022+\epsilon}. \end{equation*} As a corollary, when$f=E(z,1/2)$, we also obtain the subconvexity bound \begin{equation*}L(1/2,\pi)\ll_{\epsilon} \|\mu\|^{3/4-1/4044+\epsilon}. \end{equation*}

Subconvexity for $GL(3)\times GL(2)$ $L$-functions in $GL(3)$ spectral aspect