chaperone

An older person who accompanies other younger people to ensure the propriety of their behaviour, often an older woman accompanying a young woman.

A protein that assists the non-covalent folding/unfolding and the assembly/disassembly of other macromolecular structures, but does not occur in these structures when the latter are performing their normal biological functions.

An employee sent by a British company to the European Union to work with a client there, to circumvent restrictions imposed after Brexit.

To act as a chaperone.

They played you off very cunning, Eliza. If it had been only one of them, you could have nailed him. But you see, there was two; and one of them chaperoned the other, as you might say.

'Purcell had volunteered to chaperone a delegation of female students'

To work as a chaperone.