The advantage of interrupting a badly arranged trip (6)
I believe the answer is:
profit
'the advantage' is the definition.
(profit is a kind of advantage)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for profit that I've seen before include "It's gained on a transaction" , "Gain, return on investment" , "Gain from employment of capital" , "financial advantage" , "Use" .)