Adviser (6)
'adviser' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for mentor that I've seen before include "One who steers" , "Wise and trusted adviser" , "Guru" , "Experienced adviser" , "A trusted adviser or teacher" .)
'adviser' is the definition.
(counsellor is a kind of adviser)
This is the entire clue.
(Other definitions for counsellor that I've seen before include "Adviser; a senior diplomat" , "One who advises" , "Therapist" .)