It's intoxicating getting royal backing (5)
I believe the answer is:
lager
'it's intoxicating' is the definition.
I can't tell whether this definition defines the answer.
'royal backing' is the wordplay.
'royal' becomes 'regal' (synonyms).
'backing' says the letters should be written in reverse.
'regal' in reverse letter order is 'LAGER'.
'getting' is the link.
Can you help me to learn more?
(Other definitions for lager that I've seen before include "Effervescent beer" , "Light beer needed" , "light ale" , "Type of beer" , "Drink - 5 down (anag)" .)