On a trip, keep demanding (4-11)

I believe the answer is:

high-maintenance

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'demanding' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'on a trip keep' is the wordplay.
'on a trip' becomes 'high' (I've seen this before).
'keep' becomes 'maintenance' (maintenance is a kind of keep).
'high'+'maintenance'='HIGH-MAINTENANCE'

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I've seen this clue in The Guardian.

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