I have two clues which I think I have the answers for but cannot parse either!
Being dressed up in it makes one bristle (6)
I have STRI_A. I am sure the answer must be STRIGA but don't know why.
One undressed may turn red with this - O! (8)
I have N_DE_ESS which I'm sure must be NUDENESS but again I have no idea why. Many thanks if you can put me out my misery...