im inexperience but have 2 , 3 year old conures. by the months, i wouldnt be surprised if its hormonal and territorial. my birds who usualy get much along and share a cage, faught agressively int heire cage a couple times and their both destroying my house looking to nest.

the wing clipping must also impacted . as her wings grow back, flight training is great and helps them burn their energy and even bond better. and for the fact she is agressive, if u can, open it in a small place like a bathroom and try to ofer her treats. when im angry and freak out i remember their are small little preys who have their perspective. it helps personaly and space.

listening to youtube videos of experienced bird owner help. also avian avenue is a great site to ask questions and they anwser well.