From Longman Dictionary of Contemporary Englishstep into the breachstep into the breachHELPto help by doing someone else’s job or work when they are unable to do it syn step inThanks for stepping into the breach last week. →breach
Examples from the Corpus
step into the breach• At the eleventh hour, Halifax has stepped into the breach.• You are very brave to step into the breach.• So Mrs Thatcher, demonstrating hitherto unsuspected social graces, decided to step into the breach herself.• Mixed, she said, because it had given the theatre the opportunity to inviteP.L. O'Hara to step into the breach.• Pawelski would like to step into the breach.• Who will step into the breach?