Eccles additionally cut short breakfast and dinner? (5)
I believe the answer is:
meals
'breakfast and dinner?' is the definition.
(I've seen this in another clue)
'eccles additionally cut short' is the wordplay.
'eccles' becomes 'me' (where the crossword setter is 'Eccles').
'additionally' becomes 'also' (I've seen this before).
'cut short' means to remove the last letter.
'also' with its final letter taken away is 'als'.
'me'+'als'='MEALS'
(Other definitions for meals that I've seen before include "Collations" , "Breakfast, dinner and tea" , "Repasts" .)