Lead to getting in late, possibly (6)
I believe the answer is:
entail
'lead to' is the definition.
(thesaurus)
'getting in late possibly' is the wordplay.
'getting' says to put letters next to each other.
'possibly' is an anagram indicator.
'in' after 'late' is 'latein'.
'latein' is an anagram of 'ENTAIL'.
(Other definitions for entail that I've seen before include "Cut" , "Cause" , "Involve or require" , "settle estates for the long term" , "Involve or make necessary" .)