The phrase "a safe tactic" is correct and usable in written English.
You can use it when discussing strategies or methods that are considered low-risk or secure in a particular context.
Example: "In negotiations, using a safe tactic can help maintain a positive relationship while still achieving your goals."
Alternatives: "a secure approach" or "a cautious strategy."
As The Associated Press reported in 1952, when she was already separated from her husband, Mrs. Rockefeller had a fail-safe tactic for striking a good bargain.
Well, good luck, Mr. and Mrs. America: squeeze until your face turns red, white, and blue... Either as a nation we have grown feeble or the policy of containment, once preached as the only safe tactic for dealing with the Communist menace, has now refocussed upon the output of capitalism, in all its sparkling, poisonous, hazardous variety.
Fisher's directive, contained in a four-page memorandum titled "Use of Safe Tactics and Techniques," essentially reverses that decision and sets new standards on use of force for one of the nation's largest law enforcement agencies.
Trust me: training can instill good habits and safe tactics, but you can't control the level of fear, or the individual choice that a person makes about when to pull that trigger.
The Bush Administration, faced with a televised catastrophe, declared northern Iraq a no-fly zone and thus a safe haven, a tactic that allowed the refugees to return home.
An even safer tactic is to introduce your new guy as a friend within a whole group of male and female friends.
This is the safest tactic and the most beneficial in the long run, in addition to being 100% guaranteed to work.
His proudly individual vision stands out in a climate where play-safe tactics otherwise dominate.
Under the guise of "women's health," some states have enacted legislation that would make it almost impossible for a woman to have access to a safe, legal abortion -- a tactic that is actually harming women by forcing them to make unhealthy choices like seeking unlicensed and unsafe abortions.
