Surrounded by diamonds, in a haze (6)
I believe the answer is:
amidst
'surrounded by' is the definition.
(I've seen this before)
'diamonds in a haze' is the wordplay.
'diamonds' becomes 'd' (abbreviation in bridge say).
'in' indicates putting letters inside.
'haze' becomes 'mist' (I've seen this before).
'a'+'mist'='amist'
'd' going inside 'amist' is 'AMIDST'.
(Other definitions for amidst that I've seen before include "Central" , "During; within" , "Surrounded by" , "Embraced by" , "In the centre of" .)