If you're just looking to make it "pop" or brighten it up some you could also try a small amount of acid blend. Just add fractional amounts until it reaches the flavor profile that you want. trying it small scale is kind of the safe way to do it, like it you made a 5 gallon batch, take an 8 ounce sample and add acid blend in 1/16 tsp increments tasting after each, when you get to the level that gives you the brightness and pop up front you want without changing the over all flavor, multiply that amount by 79 and add to your total volume. so if 1/16 tsp is good add about 5 tsp.
Watch and Listen to your Mead....It will tell you when the next step is.