Smacks boundaries around cricket ground after opener is dismissed from behind (8)

I believe the answer is:
flavours
'smacks' is the definition.
('flavour' can be a synonym of 'smack')
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for flavours that I've seen before include "Tastes" , "Taste experiences" , "Sensations perceived when eating or drinking" .)
