Chelsea and Everton, say, opponents at Bridge getting half-time break? (9)
I believe the answer is:
elevenses
'half-time break?' is the definition.
(meal taken part of the way through the day)
'chelsea and everton say opponents at bridge getting' is the wordplay.
'chelsea and everton say' becomes 'elevens' (eleven can mean a football team).
'opponents at bridge' becomes 'ES' (bridge players are named after compass points).
'getting' is a charade indicator (letters next to each other).
'elevens'+'es'='ELEVENSES'
(Other definitions for elevenses that I've seen before include "tenses found immediately before this?" , "Morning refreshment break" , "Mid-morning snacks" , "Mid-morning snack" , "Morning snack" .)