Thin-skinned (9)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
sensitive
'thin-skinned' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for sensitive that I've seen before include "Controversial" , "Delicate" , "Responsive to physical stimuli (9)" , "Responsive to physical stimuli or easily offended" , "Quick to respond" .)