  Stellar feedback-driven outflows are important regulators of the gas-star
formation cycle. However, resolving outflow physics requires high resolution
observations that can only be achieved in very nearby galaxies, making suitable
targets rare. We present the first results from the new VLT/MUSE large program
MAUVE (MUSE and ALMA Unveiling the Virgo Environment), which aims to understand
the gas-star formation cycle within the context of the Virgo cluster
environment. Outflows are a key part of this cycle, and we focus on the
peculiar galaxy NGC 4383, which hosts a $\sim6\,$kpc bipolar outflow fuelled by
one of Virgo's most HI-rich discs. The spectacular MUSE data reveal the clumpy
structure and complex kinematics of the ionised gas in this M82-like outflow at
100 pc resolution. Using the ionised gas geometry and kinematics we constrain
the opening half-angle to $\theta=25-35^\circ$, while the average outflow
velocity is $\sim210$ kms$^{-1}$. The emission line ratios reveal an ionisation
structure where photoionisation is the dominant excitation process. The
outflowing gas shows a marginally elevated gas-phase oxygen abundance compared
to the disc but is lower than the central starburst, highlighting the
contribution of mixing between the ejected and entrained gas. Making some
assumptions about the outflow geometry, we estimate an integrated mass
outflow-rate of $\sim1.8~$M$_\odot$yr$^{-1}$ and a corresponding mass-loading
factor in the range 1.7-2.3. NGC 4383 is a useful addition to the few nearby
examples of well-resolved outflows, and will provide a useful baseline for
quantifying the role of outflows within the Virgo cluster.
