"Time to eat!"
'time' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'eat?' is the wordplay.
'eat' can be anagrammed to 'TEA'.
However, I am not clear how this is indicated.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for tea that I've seen before include "The cup that cheers but not inebriates" , "Evening meal - eat up" , "US party" , "A light meal - eat up" , "Common drink" .)