Had a bite
'had a bite' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ate that I've seen before include "Consumed food" , "Bolted" , "Ingested" , "mischief-maker" , "Worried" .)
(Other definitions for eat that I've seen before include "Use a knife and fork" , "Feed" , "Corrode" , "Bite, chew and swallow" , "Worry" .)