Company car takes on vacation those that may be upset (10)

I believe the answer is:

applecarts

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

'those that may be upset' is the definition.
I can't tell whether this definition defines the answer.

'company car takes on vacation' is the wordplay.
'company' becomes 'apple' (I can't explain this - if you can you should give a lot more credence to this answer).
'on vacation' suggests removing the centre.
'takes' with its middle taken out is 'ts'.
'apple'+'car'+'ts'='APPLECARTS'

Can you help me to learn more?

I've seen this clue in The Independent.

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