Flier right to have a drink (4)
I believe the answer is:
beer
'a drink' is the definition.
(beer is a kind of drink)
'flier right to have' is the wordplay.
'right' says to take the final letters (the letter on the right of the word).
'to' says to put letters next to each other (I've seen this in other clues).
'have' becomes 'bee' (I can't explain this - if you can you should believe this answer much more).
The last letter of 'flier' is 'r'.
'r' put after 'bee' is 'BEER'.
Can you help me to learn more?
(Other definitions for beer that I've seen before include "Drink with a head" , "Fermented alcoholic beverage" , "The standard English drink" , "Brewery product" , "Drink using hops, malt, etc" .)