Foresee trouble as vines age (8)

I believe the answer is:

envisage

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

'foresee' is the definition.
(thesaurus)

'trouble as vines age' is the wordplay.
'vines age' anagrams to 'ENVISAGE'.
However, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for envisage that I've seen before include "Mentally picture" , "Picture in one's mind" , "Consider, contemplate" , "See" , "Conceive of, imagine" .)

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.