Glad to see the mashed veggies seem to be doing the trick. Remember to keep switching up the ingredients, as variety will both keep her interested and keep her healthier in the long run. For the most part, you want to eliminate seeds and nuts from her regular meals, saving them exclusively as training treats and such.
Also, keep in mind that most pellet brands are not made with eclectic sensitivities in mind, and often lead to toe-tapping and wing-flipping when used as either a major part or the exclusive component of their diet. Some have reported success with brands supposedly specifically formulated for ekkies, but I choose to go with an all fresh diet and it has served my ekkies well for years, now.
As for clipping, I personally never clip my birds. But more importantly for your specific situation, I'd like to cosign on what coopedup has said. Clipping at this young age is definitely not the way to go. She should be in the midst of fledging, and clipping her wings while at this stage would be psychologically and developmentally detrimental. To clip or not to clip is a decision to be made for a later time.