Star clue (4)
I believe the answer is:
lead
I believe this clue is a double definition.
'star' is the first definition.
(I've seen this before)
'clue' is the second definition.
(thesaurus)
(Other definitions for lead that I've seen before include "Metal - wire" , "Starring role - kind of pencil" , "Precede into dale" , "Guide,direct" , "item for a dog" .)