Set out to capture a point (4)
I believe the answer is:
east
'point' is the definition.
(east is a kind of point)
'set out to capture a' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'to capture' means one lot of letters goes inside another.
'set' anagrammed gives 'est'.
'est' enclosing 'a' is 'EAST'.
(Other definitions for east that I've seen before include "course" , "Where the sun rises" , "Airport near Derby" , "Bridge player" , "On most maps it's right!" .)