City firm suppresses drunken outburst before shareholder meeting cut short (7)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

[HIC (=drunken “outburst”, i.e. a burp!) + AG <m> (=shareholder meeting, i.e. Annual General Meeting; “cut short” means last letter is dropped)] in CO (=firm, i.e. company)