Majestic beer brought up (5)
I believe the answer is:
regal
'majestic' is the definition.
(I know that majestic can be written as regal)
'beer brought up' is the wordplay.
'beer' becomes 'lager' (type of beer).
'brought up' shows that the letters should be reversed in order (in a down clue, letters go up).
'lager' written backwards gives '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" .)