Drink shot with slices in (6)
I believe the answer is:
shandy
'drink' is the definition.
(shandy is a kind of drink)
'shot with slices in' is the wordplay.
'shot' becomes 'shy' (both can mean an act of throwing something).
'with' becomes 'and' (I've seen this before).
'slices in' means one lot of letters goes inside another.
'shy' enclosing 'and' is 'SHANDY'.
(Other definitions for shandy that I've seen before include "A misture of ale and lemonade" , "Drink made of beer and lemonade" , "Beer and lemonade mix" , "Alcohol" , "Beer and lemonade mixture" .)