A drink fit for a monarch is brought back (5)
I believe the answer is:
lager
'a drink' is the definition.
(lager is a kind of drink)
'fit for a monarch is brought back' is the wordplay.
'fit for a monarch' becomes 'regal' (I've seen this before).
'is brought back' says the letters should be written in reverse.
'regal' in reverse letter order is 'LAGER'.
(Other definitions for lager that I've seen before include "Tipple" , "Type of beer" , "Light-bodied beer" , "Lout's drink?" , "Continental beer" .)