wait in the wings
US /weɪt ɪn ðə wɪŋz/
UK /weɪt ɪn ðə wɪŋz/

1.
esperar nos bastidores, estar à espreita
to be ready to do something or to take someone's place, especially in a play or other performance
:
•
The understudy is waiting in the wings, ready to perform if the main actor falls ill.
O substituto está à espera nos bastidores, pronto para atuar se o ator principal adoecer.
•
There are several talented young players waiting in the wings for a chance to join the first team.
Há vários jovens jogadores talentosos à espera nos bastidores por uma chance de se juntar ao time principal.