An insect on the move, most cautious (8)

I believe the answer is:

canniest

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

'most cautious' is the definition.
Both the answer and definition are superlative adjectives. Perhaps you can see a link between them that I can't see?

'an insect on the move' is the wordplay.
'on the move' indicates an anagram.
'an'+'insect'='aninsect'
'aninsect' anagrammed gives 'CANNIEST'.

Can you help me to learn more?

(Other definitions for canniest that I've seen before include "Shrewdest sort of ancients" , "Instance (anag)" .)

I've seen this clue in The Telegraph.

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.