(too much under) the influence and control of sb :
The British prime minister is too apt to cling to Washington's apron strings.
(too much under) the influence and control of sb :
The British prime minister is too apt to cling to Washington's apron strings.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005