Less timid (6)
I believe the answer is:
bolder
'less timid' is the definition.
('bold' can be the opposite of 'timid' so perhaps 'bolder' is reasonable for 'less timid')
This is all the clue.
(Other definitions for bolder that I've seen before include "Less shy" , "More impudent or daring" , "Braver or cheekier" .)