Small whisky in pot and a Bulgarian’s ready (8)
I believe the answer is:
stotinka
'bulgarian's ready' is the definition.
('ready' can mean 'money'; 'stotinka' is an example)
'small whisky in pot and a' is the wordplay.
'small whisky' becomes 'tot'.
'in' indicates putting letters inside.
'pot' becomes 'sink' (both can mean to put a ball in a hole in snooker).
'and' means one lot of letters go next to another.
'tot' going into 'sink' is 'stotink'.
'stotink'+'a'='STOTINKA'
(Other definitions for stotinka that I've seen before include "Bulgarian copper" , "Bulgarian's money" , "ready for Bulgarian" , "Hundredth of a Bulgarian lev" .)