School videoconferencing platform returning electronic chat (8)
I believe the answer is:
schmooze
'chat' is the definition.
(to schmooze is to chat informally)
'school videoconferencing platform returning electronic' is the wordplay.
'school' becomes 'sch'.
'videoconferencing platform' becomes 'Zoom' (program for making video calls).
'returning' is a reversal indicator.
'electronic' becomes 'e' (as in e-mail or e-books).
'zoom' back-to-front is 'mooz'.
'sch'+'mooz'+'e'='SCHMOOZE'
(Other definitions for schmooze that I've seen before include "Intimate and cosy gossip" , "Talk amicably, perhaps seeking a favour" , "Chat at a gathering" , "Talk intimately in order to manipulate" , "Gossip in a friendly way" .)