Sensitive part is ticklish, somewhat (8)
I believe the answer is:
artistic
'sensitive' is the definition.
'part is ticklish somewhat' is the wordplay.
'somewhat' indicates a hidden word.
'ARTISTIC' is hidden in the letters of 'part is ticklish'.
(Other definitions for artistic that I've seen before include "Having creative gifts" , "I stir cat (anag.)" , "Having a creative imagination" , "Fine-looking" , "crafty!" .)