Experienced a little unease, as one does (8)
I believe the answer is:
seasoned
'experienced' is the definition.
(similar in meaning)
'a little unease as one does' is the wordplay.
'a little' indicates a hidden word.
'SEASONED' is hidden within 'unease as one does'.
(Other definitions for seasoned that I've seen before include "Salted and peppered" , "Tempered" , "how curry tastes?" , "Mature" , "Gave experience to" .)