Would some boxing stumble into an excursion? (5,4)
I believe the answer is:
round trip
'an excursion?' is the definition.
(I've seen this before)
'would some boxing stumble' is the wordplay.
I cannot really see how this works, but
'would' could be 'd' (I've seen this in other clues) and 'd' is present in the answer.
'stumble' could be 'trip' (synonyms) and 'trip' is found within the answer.
This explanation may well be incorrect...
'into' is the link.
Can you help me to learn more?
(Other definitions for round trip that I've seen before include "excursion" , "kind of voyage" , "whole journey" , "bar and back?" , "Journey that gets you back home" .)