buckle down
• tackle a task with determination.
• "the pair buckled down and started to train seriously"
Similar:
get (down) to work,
set to work,
get down to business,
roll up one's sleeves,
put one's hand to the plough,
work hard,
apply oneself,
make an effort,
strive,
be industrious,
be diligent,
be assiduous,
exert oneself,
focus,
get cracking,
pull/get one's finger out,
get weaving,
get off one's backside,
get stuck in,
