Star hit hard — browned off (9)
I believe the answer is:
suntanned
'browned off' is the definition.
(I've seen this before)
'star hit hard' is the wordplay.
'star' becomes 'sun' (the Sun is a star).
'hit hard' becomes 'tanned' (I can't justify this - if you can you should give a lot more credence to this answer).
'sun'+'tanned'='SUNTANNED'
Can you help me to learn more?
(Other definitions for suntanned that I've seen before include "affected by prolonged exposure" , "With bronzed skin" , "Browning?" , "Browned off" .)