Restraint; shyness (9)
I believe the answer is:
reticence
I believe this clue is a double definition.
'restraint' is the first definition.
(I've seen this before)
'shyness' is the second definition.
(I've seen this before)
(Other definitions for reticence that I've seen before include "modesty" , "Shyness" , "Restraint" , "Unwillingness to talk" , "Tendency to hold back" .)