Crossword Genius

Sluggish at interchange (5)

Ross

I believe the answer is:

inert

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

'sluggish' is the definition.
(synonyms)

'at interchange' is the wordplay.
I cannot quite understand how this works, but
'at' could be 'in' and 'in' is found within the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for inert that I've seen before include "Sluggish, still" , "Like some gases" , "Chemically unreactive" , "Without the strength to move" , "Not active or reactive" .)

I've seen this clue in The Mirror.
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.