Time to point chop out (5)
I believe the answer is:
epoch
'time' is the definition.
(I know that epoch is a type of geologic time)
'point chop out' is the wordplay.
'point' becomes 'E' (compass point).
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'chop' is an anagram of 'poch'.
'e'+'poch'='EPOCH'
'to' is the link.
(Other definitions for epoch that I've seen before include "Sure date" , "Historical period" , "Distinctive period of time" , "Period, era" , "Age, time span" .)