Say everybody, for instance, gets an early start (6)
I believe the answer is:
allege
'say' is the definition.
(I know that say can be written as allege)
'everybody for instance gets an early start' is the wordplay.
'everybody' becomes 'all' (I've seen this before).
'for instance' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'gets' is a charade indicator (letters next to each other).
'start' suggests taking the first letters.
The first letter of 'early' is 'e'.
'all'+'eg'+'e'='ALLEGE'
(Other definitions for allege that I've seen before include "Accuse without established proof" , "Swear" , "Declare without being able to prove" , "Aver - maintain" , "Declare without actual proof" .)