A tip from the boss (4)
I believe the answer is:
head
This clue is a double definition.
'a tip' is the first definition.
(head is a kind of tip)
'the boss' is the second definition.
(thesaurus)
'from' acts as a link.
(Other definitions for head that I've seen before include "Edible part of cabbage" , "Beer foam; front" , "School boss" , "See 14" , "See 25" .)