Actually, not all the "chasers" are necessarily male, and not all the "chasees" necessarily female, but, in general that is the way of it.
Having one female in a tank of males is setting yourself up for a breeding event. Depending on the breed of the fish, the males can get very aggressive and physically harm the female (and themselves) body checking her into the tank sides and any deco that is in the tank.
To reduce breeding activity, it is best to try to keep the temperatures of the tank at even, steady temps. The changing temperatures can often set off breeding behavior. Heavy feeding regiments, also, can set things up for breeding behavior.
But, supposed that you have controled what you can - and they are still going at it. The best thing, of course, is to separate the two sexes. I try to keep males and female strictly separate at all times, EXCEPT when I specifically want breeding to occur.
If you cannot separate them into separate tanks, at least until your female drops her eggs - or to give her a break and a much needed rest - you can give her a "time out" basket. This can be any plastic basket that floats and has sufficiant room that the fish fits into the basket and can turn around. Make sure that the slits in the basket side are small enough that the fish in the tank or the basket cannot get their heads stuck in them and that the cuts of the slits are smooth and do not have sharp mold flashing on them. I like the little plastic baskets that are sold for closet organization. They are 12 X 6 X 6 inches with open work on all sides and a solid bottom. I have also used a plastic colandar from the kitchen at times for isolation. It works well, also. It is preferable that you have the slits in the sides so the water flows through well and you get good water exchange for the fish in the basket.
) is being chased.....relentlessly! Do you just let them go about their business? Or do you separate them?
..I had that idea randomly last night actually..