For starters restaurant offers exotic caviare (3)
I believe the answer is:
roe
'caviare' is the definition.
(I've seen this before)
'for starters restaurant offers exotic' is the wordplay.
'for starters' indicates taking the first letters.
The initial letters of 'restaurant offers exotic' is 'ROE'.
(Other definitions for roe that I've seen before include "Food from fish" , "eg Caviare" , "Part of fish, sounds like go through water" , "Mass of fish's eggs" , "A mass of fish-eggs" .)