Gives a large double to the drunken sot (6)
I believe the answer is:
allots
'gives' is the definition.
(allotting is a kind of giving)
'a large double to the drunken sot' is the wordplay.
'large' becomes 'l'.
'double' shows that letters should be duplicated.
'to the drunken' indicates anagramming the letters.
'l' duplicated is 'll'.
'sot' anagrammed gives 'ots'.
'a'+'ll'+'ots'='ALLOTS'
(Other definitions for allots that I've seen before include "Allows to have" , "Distributes, gives as share" , "Dispenses or distributes" , "Gives, apportions" , "Apportions or assigns" .)