https://tex.stackexchange.com/q/590529/35864

gloslaterr.tex

\documentclass[british]{article}
\usepackage[T1]{fontenc}
\usepackage{babel}
\usepackage{csquotes}
\usepackage{glossaries}

\newglossaryentry{latex}
{
    name={\protect\LaTeX}, 
    description={blabla},
    sort={latex}
}

\makeglossaries

% this gives an error
\renewcommand{\LaTeX}{\gls{latex}}

\begin{document}
\gls{latex}

\printglossaries
\end{document}