Caviar served around mid-evening is left - is that fair? (8)
I believe the answer is:
carnival
'that fair?' is the definition.
('carnival' can be a synonym of 'fair')
'caviar served around mid-evening is left' is the wordplay.
'served' indicates an anagram.
'around' indicates putting letters inside.
'mid' says to take the centre.
'is left' becomes 'l' (common abbreviation**).
The middle of 'evening' is 'n'.
'caviar' is an anagram of 'cariva'.
'cariva' going around 'n' is 'carniva'.
'carniva'+'l'='CARNIVAL'
'is' is the link.
(Other definitions for carnival that I've seen before include "Festive fair" , "Public celebration with processions, music, etc" , "Travelling funfair" , "Public merrymaking, usually with procession" , "Festive period" .)