Remettre les pendules à l’heure.

>>> It means ‘back to the square one’ . Everything turns to the beginning. Or there are few persons talk about something they couldn’t make the deals. They keep arguing or disagree each other. Then they might say ‘Let's get down to business. In common, there is another meaning altogether: to set things straight. Things need to be straightened out.‘ Par exemple, Remettons les pendules à l’heure. ‘

 

Remettre = reset

 

les pendules =  the clocks

 

à = to

 

l’heure = the time