A working party is a committee which is formed to investigate a particular situation or problem andto produce a report containing its opinions and suggestions.
[mainly British]
They set up a working party to look into the issue.
...a finance working party.
regional note: in AM, usually use working group
working party in British English
noun
1.
a committee established to investigate a problem, question, etc
2.
a group of soldiers or prisoners assigned to perform some manual task or duty
Examples of 'working party' in a sentence
working party
Before his guests departed a working party agreed to meet in a few days ' time and he received numerous invitations to dine out.
Forbes, Bryan A SONG AT TWILIGHT
But to infiltrate a Russian naval working party -- that's impossible.