I'm about to tuck into a shot and a Bud abroad (5)
I believe the answer is:
amigo
'bud abroad' is the definition.
'amigo' can be an answer for 'bud' (I've seen this in another clue). I'm unsure of the 'abroad' bit.
'i'm about to tuck into a shot and a' is the wordplay.
'about' indicates anagramming the letters.
'to tuck into' indicates putting letters inside.
'a shot' becomes 'go' (both can mean an attempt).
'and' is a charade indicator (letters next to each other).
'im' anagrammed gives 'mi'.
'go' put after 'a' is 'ago'.
'mi' inserted within 'ago' is 'AMIGO'.
Can you help me to learn more?
(Other definitions for amigo that I've seen before include "Male (Spanish?) friend" , "Spanish word meaning friend" , "Mexican's mate" , "friend in Uruguay" , "Friend, comrade" .)