hello I can't see this clue in The Times sat Jumbo but with regard to discussion one of my dictionaries refers you to GROUP for bevy. so group discussion if this is any help. ?
The drink is generally spelt 'bevvy'...ie with a double 'v'...whereas the group is invariably 'bevy' with a single 'v'. The 'under discussion' element is just one of these 'it sounds like' indications.