Half of Belgians are shocked by Queen - drinking this? (5,4)

I believe the answer is:

lager beer

'drinking this?' is the definition.
(type of beer)

'half of belgians are shocked by queen' is the wordplay.
'half of' indicates taking half.
'shocked' indicates an anagram.
'by' means one lot of letters go next to another.
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'belgians' halved is 'belg'.
'belg'+'are'='belgare'
'belgare' is an anagram of 'lagerbe'.
'lagerbe'+'er'='LAGER BEER'

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