Reluctant to draw attention to oneself, shy (8)
I believe the answer is:
retiring
I believe this is a double definition.
'reluctant to draw attention to oneself' is the first definition.
(I've seen this before)
'shy' is the second definition.
(I've seen this before)
(Other definitions for retiring that I've seen before include "Timid" , "Bashful" , "Shy, avoiding company" , "Giving up work for good" , "shrinking" .)