Jan and I do arrange to be in contact (6)
I believe the answer is:
adjoin
'be in contact' is the definition.
(thesaurus)
'jan and i do arrange' is the wordplay.
'and' is a charade indicator (letters next to each other) (I've seen this in other clues).
'arrange' indicates an anagram.
'i'+'do'='ido'
'jan' put after 'ido' is 'idojan'.
'idojan' with letters rearranged gives 'ADJOIN'.
'to' acts as a link.
(Other definitions for adjoin that I've seen before include "Be nineteen [NEXT]" , "20 down" , "Lie next to" , "Be next to, like building" , "Lie adjacent to another" .)