Within a day ghost leaving house (7)

I believe the answer is:

amongst

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'within' is the definition.
I know nothing about this answer so I can't judge whether this works.

'a day ghost leaving house' is the wordplay.
'day' becomes 'mon' (short for Monday).
'leaving' is a deletion indicator.
'house' becomes 'ho' (abbreviation for house).
'ghost' with 'ho' taken away is 'gst'.
'a'+'mon'+'gst'='AMONGST'

Can you help me to learn more?

(Other definitions for amongst that I've seen before include "Within the group of" , "In the midst of" , "Having been absorbed, perhaps" , "Famous novel by John McGahern: '... Women'" , "Amid" .)

I've seen this clue in The Sun and The Times.

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