Time to include the northbound sailor’s list of lapses (6)
I believe the answer is:
errata
'list of lapses' is the definition.
'errata' can be an answer for 'list' (I have seen 'List of mistakes ' mean 'errata' so perhaps 'list' could also mean 'errata'). I am not sure about the 'of lapses' bit.
'time to include the northbound sailor's' is the wordplay.
'time' becomes 'era' (era is a kind of time).
'to include' indicates putting letters inside.
'the northbound' is a reversal indicator.
'sailor' becomes 'tar' (slang term for a sailor).
'tar' written backwards gives 'rat'.
'era' placed around 'rat' is 'ERRATA'.
Can you help me to learn more?
(Other definitions for errata that I've seen before include "mistakes in print" , "Mistakes in printed work" , "Corrigenda" , "Noted mistakes" , "Mistakes (Latin)" .)