Hotel to show former president embracing reading? One may go into shock ... (9)
I believe the answer is:
hairbrush
'one may go into shock' is the definition.
(shock can mean a mass of hair)
'hotel to show former president embracing reading?' is the wordplay.
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'to show' becomes 'air' (both can mean broadcast).
'former president' becomes 'Bush' (either of the George Bushes).
'embracing' means one lot of letters goes inside another.
'reading?' becomes 'r' (one of the traditional three R's of education).
'bush' going around 'r' is 'brush'.
'h'+'air'+'brush'='HAIRBRUSH'
(Other definitions for hairbrush that I've seen before include "Locks straightener" , "Personal grooming tool" , "It supplements comb for tidying tresses" , "Grooming aid" , "It is used with a comb" .)