Crossword Genius

Working from home's too much in confined space, amid dirt, really exhausted (7,8)

Ross

I believe the answer is:

cottage industry

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

'working from home's' is the definition.
(I've seen this before)

'too much in confined space amid dirt really exhausted' is the wordplay.
I cannot quite see how this works, but
'in' is within the answer.
'dirt' could be 'dust' (dust is a kind of dirt) and 'dust' is found in the answer.
'too much' could be 'ott' (short for 'over the top' - informal British) and 'ott' is present in the answer.
'confined space' could be 'cage' (I've seen this before) and 'cage' is located in the leftover letters.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for cottage industry that I've seen before include "homework" , "country practice" , "Small business" , "small-scale business" , "Working from home" .)

I've seen this clue in The Independent.
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