Like an uncle (9)
I believe the answer is:
avuncular
'like an uncle' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for avuncular that I've seen before include "Genial" , "Kind and indulgent" , "Of an uncle - friendly" , "Like a kindly uncle" , "Kind and friendly towards a younger or less experienced person" .)