Quiet, repressed (7)
I believe the answer is:
subdued
I believe this clue is a double definition.
'quiet' is the first definition.
(I know that quiet can be written as subdued)
'repressed' is the second definition.
('subdue' can be a synonym of 'repress')
(Other definitions for subdued that I've seen before include "Chastened" , "Quietened, brought under control" , "'Restrained, low-key (7)'" , "Quieted and brought under control" , "Quiet; repressed" .)