Starters from posh, exclusive Thai restaurant include famous dish (5)
I believe the answer is:
petri
'famous dish' is the definition.
'petri' can be an answer for 'dish' (petri dish is a kind of dish). I'm not sure about the 'famous' bit.
'starters from posh exclusive thai restaurant include' is the wordplay.
'starters from' says to take the initial letters.
The first letters of 'posh exclusive thai restaurant include' is 'PETRI'.
Can you help me to learn more?
(Other definitions for petri that I've seen before include "-- Dish, used for cultures" , "- - dish (science)" , "Sort of dish" , "Scientist" , "Bacteriologist giving name to culturing dish" .)