The benefit of arranging a trip out (6)
I believe the answer is:
profit
'the benefit' is the definition.
(I've seen this before)
'of arranging a trip out' is the wordplay.
'arranging' indicates an anagram.
'out' is an insertion indicator.
'trip' anagrammed gives 'prit'.
'of' placed into 'prit' is 'PROFIT'.
(Other definitions for profit that I've seen before include "Gain from employment of capital" , "returns" , "Net gain after expenses" , "financial advantage" , "It's gained on a transaction" .)