Drink before sporting fixture in Ascot? (7)
I believe the answer is:
necktie
'ascot?' is the definition.
(ascot is a type of tie)
'drink before sporting fixture' is the wordplay.
'drink' becomes 'neck' (to neck a drink is to drink it quickly).
'before' means one lot of letters go next to another.
'sporting fixture' becomes 'tie' (a tie is a sports match).
'neck'+'tie'='NECKTIE'
'in' is the link.
(Other definitions for necktie that I've seen before include "Band in the US" , "Long narrow piece of material worn knotted at the front" , "Item of (American) clothing" , "Garment typically for a man" , "What Yank may wear" .)