Majestic beer brought up (5)
I believe the answer is:
regal
'majestic' is the definition.
(synonyms)
'beer brought up' is the wordplay.
'beer' becomes 'lager' (type of beer).
'brought up' says the letters should be written backwards (in a down clue, letters go up).
'lager' backwards is 'REGAL'.
(Other definitions for regal that I've seen before include "Kingly or queenly" , "Showing great dignity" , "King-like" , "Fit for a king" , "fit for the Queen" .)