Shy, faint-hearted (5)
I believe the answer is:
timid
This clue is a double definition.
'shy' is the first definition.
(I know that shy can be written as timid)
'faint-hearted' is the second definition.
(I know that faint-hearted can be written as timid)
(Other definitions for timid that I've seen before include "Not brave" , "Diffident, faint-hearted" , "Not assertive, retiring" , "Easily frightened" , "Bashful or fearful" .)