See women planning trips with kids. occasionally — one's down with them (3,7)

I believe the answer is:

low spirits

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'kids occasionally one's down with them' is the definition.
I can't tell whether this defines the answer.

'see women planning trips' is the wordplay.
'see' becomes 'lo' (archaic word meaning 'look!').
'women' becomes 'w'.
'planning trips' becomes 'spirits' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'lo'+'w'+'spirits'='LOW SPIRITS'

'with' is the link.

Can you help me to learn more?

(Another definition for low spirits that I've seen is " Mild depression".)

I've seen this clue in The Guardian.

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