临时拼凑起来的队伍／派别／管弦乐队
a group of people brought together in a hurry in order to play together on a particular occasion
He knew that any shortcomings of what was essentially a scratch side would be exposed by the opposition.
It wasn't a bad performance for a scratch team.
We had to quickly put together a scratch team, which wasn't easy.
They did pretty well for a scratch side.
She used a scratch orchestra of complete amateurs but the results were impressive.
See also: scratch adjective