trick of the trade
a clever method used by people who are experienced in a particular type of work or activity:
Newspapers often improve photographs before they print them - it's one of the tricks of the trade.

[TahlilGaran] Advanced Learner's Dictionary ▲

trick of the trade
a smart/quick/skillful way of doing something
The man knows many tricks of the trade in the publishing business.

[TahlilGaran] English Idioms Dictionary ▲

trick of the trade
n. phr., usually in plural, informal
1. A piece of expert knowledge; a smart, quick, or skillful way of working at a trade or job.
Mr. Olson spent years learning the tricks of the trade as a carpenter.
Any one can learn how to hang wallpaper, but only an expert can show you the tricks of the trade.
2. A smart and sometimes tricky or dishonest way of doing something in order to succeed or win.
The champion knows all the tricks of the boxing trade; he knows many ways to hurt his opponent and to get him mixed up.

[TahlilGaran] English Idioms Dictionary ▲