Husband staying inside can slim (4)

I believe the answer is:

thin

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'slim' is the definition.
(similar in meaning)

'husband staying inside' is the wordplay.
'husband' becomes 'h' (abbreviation).
'staying' becomes 'tin' (I can't explain this - if you can you should believe this answer much more).
'inside' is an insertion indicator.
'h' put inside 'tin' is 'THIN'.

'can' is the link.

Can you help me to learn more?

(Other definitions for thin that I've seen before include "Dilute; lean" , "Narrow, slim" , "Made of light material" , "Flimsy" , "Scrawny" .)

I've seen this clue in The Times.

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