Tell close friend (8)
I believe the answer is:
intimate
I believe this is a triple definition!
'tell' is the first definition.
(thesaurus)
'close' is the second definition.
('intimate' can be similar in meaning to 'close')
'friend' is the third definition.
(intimate is a kind of friend)
(Other definitions for intimate that I've seen before include "Closely acquainted" , "Infer; personal" , "Thick" , "Tip off" , "Private and personal like close acquaintanceship" .)