Possible Clues:

• They check the accounts
• People checking tax returns
• Gold I'd returned to king, initially satisfying accountants
• It's a dour play for those listening in
• Checkers of books
• It's a dour adaptation for those listening in
• Bank examiners' colleagues
• It's a dour novel for those listening in
• German car, sort engineered for accounts people
• They hear and sum up all the accounts