Another expression is, 'isn't it time to loosen your apron strings?'

Another phrase would be "Get the poor kid out from under your thumb". "Under sb thumb" is an idiom for being under someone's control.

Hello rrooxx, "get your claws into somebody" means informally to try to influence or control someone. I don't know about this expression " to get someone out of your claws" ,but if it exists, it will probably mean to stop controlling them. " Don't try to control the poor kid."