Appalled — but helping to make Branagh a star (6)
I believe the answer is:
aghast
'appalled' is the definition.
(I know that appalled can be written as aghast)
'helping to make branagh a star' is the wordplay.
'helping to make' indicates a hidden word.
'AGHAST' can be found hidden inside 'branagh a star'.
'aeur but' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for aghast that I've seen before include "Filled with consternation or horror" , "Thunderstruck" , "Struck with horror" , "Stupefied with horror" , "Appalled, shocked" .)