Appalled by Henry, when getting into a sports car (6)
I believe the answer is:
aghast
'appalled' is the definition.
(I know that appalled can be written as aghast)
'henry when getting into a sports car' is the wordplay.
'henry' becomes 'H' (symbol for the unit of electrical inductance).
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'getting into' is an insertion indicator.
'sports car' becomes 'GT' (abbreviation for grand tourer).
'h'+'as'='has'
'a'+'gt'='agt'
'has' going into 'agt' is 'AGHAST'.
'by' is the link.
(Other definitions for aghast that I've seen before include "Taken aback with horror" , "struck with fear" , "Appalled, shocked" , "Stupefied with horror" , "Very unhappy" .)