Shocked into being, at some stage, a bit hasty? (6)
I believe the answer is:
aghast
'shocked' is the definition.
(I know that shocked can be written as aghast)
'into being at some stage a bit hasty?' is the wordplay.
'into' means one lot of letters goes inside another.
'being at some stage' becomes 'agast' (I am not sure about this - if you are sure you should believe this answer much more).
'a bit' says to take the initial letters (I've seen 'bit of' mean this).
The first letter of 'hasty' is 'h'.
'agast' enclosing 'h' is 'AGHAST'.
Can you help me to learn more?
(Other definitions for aghast that I've seen before include "Stupefied with horror" , "Filled with terror" , "in awe" , "Filled with consternation or horror" , "'Horrified, shocked (6)'" .)