Drink belonging to us? Hearsay (6)
I believe the answer is:
rumour
'hearsay' is the definition.
('rumour' can be a synonym of 'hearsay')
'drink belonging to us?' is the wordplay.
'drink' becomes 'rum' (I've seen this before).
'belonging to us?' becomes 'our' (I've seen this before).
'rum'+'our'='RUMOUR'
(Other definitions for rumour that I've seen before include "Story going around" , "Doubtful story" , "Unconfirmed gossip" , "Hearsay, gossip" , "buzz" .)