Orient, possibly, at the outset after clarifying advice (7)
I believe the answer is:
pointer
'advice' is the definition.
(thesaurus)
'orient possibly at the outset after clarifying' is the wordplay.
'at the outset' indicates taking the first letters.
'after clarifying' is an anagram indicator.
The first letter of 'possibly' is 'p'.
'orient'+'p'='orientp'
'orientp' with letters rearranged gives 'POINTER'.
(Other definitions for pointer that I've seen before include "Arrow" , "helpful tip!" , "Dog < or horse or" , "something moved by mouse" , "Indicator" .)