Crossword Genius

Uncomfortable suburban house left vacant initially by kid (3,2,4)

Ross

I believe the answer is:

ill at ease

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

'uncomfortable' is the definition.
(I've seen this before)

'suburban house left vacant initially by kid' is the wordplay.
I cannot quite see how this works, but
'left' could be 'l' (common abbreviation) and 'l' is found within the answer.
'by' could be 'at' and 'at' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for ill at ease that I've seen before include "Fidgety" , "discomfited" , "wound up" , "On edge" , "appear uncomfortable" .)

I've seen this clue in The Hindu.
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