Go for a stroll, but with a meal out (8)
I believe the answer is:
ambulate
'go for a stroll' is the definition.
(I've seen this before)
'but with a meal out' is the wordplay.
'with' says to put letters next to each other.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'a'+'meal'='ameal'
'but' put after 'ameal' is 'amealbut'.
'amealbut' with letters rearranged gives 'AMBULATE'.
(Other definitions for ambulate that I've seen before include "Go for a stroll" , "Walk (technical)" .)