Crossword Genius

Spend a night in a filthy place outside (4)

Ross

I believe the answer is:

stay

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

'spend a night' is the definition.
I can't judge whether this defines the answer.

'a filthy place outside' is the wordplay.
'filthy place' becomes 'sty' (I've seen this before).
'outside' is an insertion indicator (some letters go outside others).
'a' placed within 'sty' is 'STAY'.

'in' is the link.

Can you help me to learn more?

(Other definitions for stay that I've seen before include "Guy rope" , "guy giving > support" , "Defer" , "Supporting rod" , "Remain; suspend" .)

I've seen this clue in The Globe and Mail.
Want a hint initially instead of a full solution? Install my app