Unusual treat that is about to come again (7)

I believe the answer is:

iterate

I'm a little stuck... Click here to teach me more about this clue!

'to come again' is the definition.
I can't judge whether this defines the answer.

'unusual treat that is about' is the wordplay.
'unusual' indicates an anagram.
'that is' becomes 'ie' (abbreviation for id est, 'that is' in Latin).
'about' is an insertion indicator.
'treat' anagrammed gives 'terat'.
'terat' inserted within 'ie' is 'ITERATE'.

Can you help me to learn more?

(Other definitions for iterate that I've seen before include "Recapitulate" , "Say again, repeat" , "Repeat, state again" , "State repeatedly, say again" , "Utter or perform repeatedly" .)

I've seen this clue in The Globe and Mail.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.