The company has relied on government support, but the government is now threatening to 'cut the apron strings'. [=to stop providing support]
He's generous, but there are always 'strings attached'. [=he always expects something in return for what he gives to people]
He really loved her but she was just 'stringing' him 'along'. [=making him think that she loved him so she could use him]
(..) - A little sick of practicing. I understand. But you're doing all right. I haven't received any complaints. I put a cloth over the strings to lessen the noise. That's very smart. - Not everyone loves music. - I know. What does your father do? (..)1994 Léon: The Professional