Eggs run out before start of Easter (3)
I believe the answer is:
roe
'eggs' is the definition.
(I've seen this in other clues)
'run out before start of easter' is the wordplay.
'run out' becomes 'ro' (cricket abbreviation).
'before' means one lot of letters go next to another.
'start of' suggests taking the first letters.
The first letter of 'easter' is 'e'.
'ro'+'e'='ROE'
(Other definitions for roe that I've seen before include "Fish eggs; small deer" , "Mass of fish eggs" , "A mass of fish-eggs" , "Caviar" , "Lobster's ripe ovary" .)