Anticipated time visitor was heard (6-7)

'heard' is the definition.
Both the answer and definition are adjectives.
Perhaps there's an association between them I don't understand?

'anticipated time visitor' is the wordplay.
I cannot quite understand how this works, but
'anticipated' could be 'guessed' (guessing is a kind of anticipating) and 'guessed' is found in the answer.
'time' could be 'second' (unit of time) and 'second' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

'was' acts as a link.

Can you help me to learn more?