Meal in Chunnel poor: nothing eaten (8)
I believe the answer is:
luncheon
'meal' is the definition.
(luncheon is a kind of meal)
'chunnel poor nothing eaten' is the wordplay.
'poor' indicates an anagram.
'nothing' becomes 'O' (O resembles 0).
'eaten' is an insertion indicator.
'chunnel' anagrammed gives 'lunchen'.
'lunchen' placed around 'o' is 'LUNCHEON'.
'in' acts as a link.
(Other definitions for luncheon that I've seen before include "Food" , "midday menu" , "Midday meal" , "formal occasion" , "fare at one?" .)